/* TUM corporate palette: navy (#003359), brand blue (#0065BD — TUM logo), white */
:root {
    --tum-navy: #003359;
    --tum-bright: #0065bd;
    --tum-bright-web: #0065bd;
    --tum-blue-light: #0065bd;
    --tum-blue-hover: #0054a8;
    --tum-white: #ffffff;
    --tum-border: rgba(0, 51, 89, 0.22);
    --tum-text: #003359;
    --tum-text-muted: rgba(0, 51, 89, 0.72);
    --tum-text-soft: rgba(0, 51, 89, 0.55);
    /* Semantic hues use only TUM blues (no extra brand colors) */
    --tum-success: #0065bd;
    --tum-error: #003359;
    --tum-logo-blue: #0065bd;
    --tum-blue-bright: #0065bd;
    --tum-intro-dark: #003359;
    --intro-title-size: clamp(2rem, 5.5vw, 3.35rem);

    --font-main: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
    --font-tum-ar: 'Sora', 'Segoe UI', system-ui, sans-serif;
    --font-ui: 'Inter', 'Segoe UI', system-ui, sans-serif;

    /* Theme surfaces (main app — light default) */
    --app-page: #f2f7fb;
    --app-surface: #ffffff;
    --app-muted: #f2f7fb;
    --app-input-bg: #ffffff;
    /* Legacy aliases → map to TUM tokens */
    --tum-gray: rgba(0, 51, 89, 0.85);
    --tum-gray-light: rgba(0, 51, 89, 0.62);
    --tum-gray-bg: var(--app-muted);
    --tum-bg-subtle: var(--app-page);
    color-scheme: light;

    /* Motion & elevation (main app) */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.2, 0.64, 1);
    --dur-fast: 0.18s;
    --dur-med: 0.35s;
    /* Corner radius: use consistently — cards/shells vs controls/inner surfaces */
    --radius-card: 0.75rem;
    --radius-control: 0.5rem;
    --radius-sm: 0.25rem;
    --radius-pill: 9999px; /* circular icon buttons only */
    --shadow-card: none;
    --shadow-card-hover: none;
    --shadow-header: none;
}

html[data-theme="dark"] {
    --app-page: #0a1520;
    --app-surface: #0f2230;
    --app-muted: #162a3d;
    --app-input-bg: #1a3048;
    --tum-text: #e6eef5;
    --tum-text-muted: rgba(230, 238, 245, 0.75);
    --tum-text-soft: rgba(230, 238, 245, 0.55);
    --tum-border: rgba(0, 101, 189, 0.4);
    --tum-gray: rgba(230, 238, 245, 0.9);
    --tum-gray-light: rgba(230, 238, 245, 0.65);
    --tum-intro-dark: #e6eef5;
    --tum-error: #e6eef5;
    --shadow-card: none;
    --shadow-card-hover: none;
    --shadow-header: none;
    color-scheme: dark;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

/* Shared backdrop — intro splash + auth (flat TUM navy) */
.intro-splash,
.auth-screen {
    background-color: #003359;
    background-image: none;
    background-attachment: fixed;
}

/* Auth — full-viewport split, glass panels on TUM backdrop (below splash during crossfade) */
.auth-screen {
    position: relative;
    z-index: 9998;
    min-height: 100vh;
    min-height: 100dvh;
    width: 100%;
    opacity: 0;
    pointer-events: none;
    transition: opacity 1.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.auth-screen.auth-screen--visible {
    opacity: 1;
    pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
    .auth-screen {
        transition-duration: 0.01ms;
    }
}

.auth-layout {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(220px, 34vw) minmax(0, 1fr);
    min-height: 100vh;
    min-height: 100dvh;
    width: 100%;
}

.auth-brand-panel {
    background: rgba(0, 26, 46, 0.55);
    color: var(--tum-white);
    border-right: 1px solid rgba(0, 101, 189, 0.25);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: clamp(16px, 2.5vh, 28px);
    padding: clamp(32px, 5vw, 64px) clamp(24px, 3.5vw, 44px);
    box-sizing: border-box;
    width: 100%;
    min-height: 100%;
    min-width: 0;
    transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.12s;
}

/* Keep current offsets, but center all brand-panel children as one block */
.auth-brand-panel > * {
    align-self: center;
    margin-left: auto;
    margin-right: auto;
}

.auth-brand-panel__logo {
    width: min(100%, 240px);
    height: auto;
    display: block;
    border-radius: var(--radius-control);
    /* Pull next line up so transparent pixels below the mark don't add visual gap */
    margin: 0 auto -24px;
    max-width: 100%;
    justify-self: center;
}

.auth-brand-panel__tum-wordmark {
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: clamp(1.05rem, 1.95vw, 1.45rem);
    font-weight: 400;
    letter-spacing: 0.01em;
    line-height: 1.08;
    margin: -44px 0 0;
    color: var(--tum-white);
    text-align: center;
    align-self: center;
}

.auth-brand-panel__hint {
    font-size: clamp(0.9rem, 1.4vw, 1rem);
    font-weight: 500;
    margin: 0;
    opacity: 0.88;
    line-height: 1.4;
}

.auth-main-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(24px, 4vw, 56px);
    box-sizing: border-box;
    overflow: hidden;
    background: transparent;
}

.auth-main-panel__header {
    margin: 0 0 16px;
    font-family: var(--font-tum-ar);
    font-size: clamp(1.7rem, 4.4vw, 2.7rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1;
    color: var(--tum-white);
    text-align: center;
    white-space: nowrap;
}

.auth-screen:not(.auth-screen--visible) .auth-card {
    transform: translateY(20px);
}

.auth-screen.auth-screen--visible .auth-card {
    transform: translateY(0);
    transition: transform 0.95s cubic-bezier(0.22, 1, 0.36, 1) 0.18s;
}

.auth-screen:not(.auth-screen--visible) .auth-brand-panel {
    transform: translateY(14px);
}

.auth-screen.auth-screen--visible .auth-brand-panel {
    transform: translateY(0);
    transition: transform 0.85s cubic-bezier(0.22, 1, 0.36, 1) 0.1s;
}

@media (prefers-reduced-motion: reduce) {
    .auth-screen .auth-card,
    .auth-screen .auth-brand-panel {
        transition-duration: 0.01ms;
    }
}

.auth-card {
    width: 100%;
    max-width: 520px;
    background: rgba(8, 22, 40, 0.45);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: border-color 0.35s ease;
}

.auth-screen.auth-screen--visible .auth-card:hover {
    border-color: rgba(0, 101, 189, 0.35);
}

.auth-form {
    font-family: var(--font-ui);
    padding: 28px 28px 32px;
}

.auth-form-title {
    font-family: var(--font-tum-ar);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--tum-white);
    margin-bottom: 22px;
}

.auth-form label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}

.auth-form input {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1.5px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-control);
    font-size: 15px;
    margin-bottom: 18px;
    font-family: inherit;
    color: var(--tum-white);
    background: rgba(0, 26, 46, 0.5);
    transition: border-color 0.25s ease, background 0.25s ease;
}

.auth-form input::placeholder {
    color: rgba(255, 255, 255, 0.55);
}

.auth-form input:hover {
    border-color: rgba(0, 101, 189, 0.55);
    background: rgba(0, 35, 60, 0.55);
}

.auth-form input:focus {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
    border-color: var(--tum-bright-web);
    background: rgba(0, 40, 68, 0.65);
}

.password-wrap {
    position: relative;
    margin-bottom: 18px;
}

.password-wrap input {
    margin-bottom: 0;
    padding-right: 48px;
}

.password-toggle {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: 10px;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-control);
    transition: color 0.2s ease, background 0.2s ease;
}

.password-toggle:hover {
    color: var(--tum-white);
    background: rgba(0, 101, 189, 0.2);
}

.password-toggle svg {
    width: 20px;
    height: 20px;
}

.auth-error {
    display: block;
    font-size: 13px;
    color: var(--tum-white);
    margin-bottom: 12px;
    line-height: 1.4;
    padding: 8px 10px;
    background: rgba(0, 101, 189, 0.25);
    border-radius: var(--radius-control);
    border: 1px solid rgba(0, 101, 189, 0.45);
}

/* No placeholder box when there is no message */
.auth-error:empty,
.auth-success:empty {
    display: none;
    margin-bottom: 0;
    padding: 0;
    border: none;
}

.auth-success {
    display: block;
    font-size: 13px;
    color: var(--tum-white);
    margin-bottom: 12px;
    line-height: 1.45;
    padding: 8px 10px;
    background: rgba(0, 101, 189, 0.2);
    border-radius: var(--radius-control);
    border: 1px solid rgba(0, 101, 189, 0.4);
}

.auth-forgot {
    margin: -6px 0 18px;
    text-align: right;
}

.auth-form-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 16px;
    line-height: 1.5;
}

.auth-tum-hint {
    margin: -6px 0 12px;
    font-size: 12px;
    padding: 10px 12px;
    background: rgba(0, 101, 189, 0.12);
    border-radius: var(--radius-control);
    border: 1px solid rgba(0, 101, 189, 0.35);
    color: rgba(255, 255, 255, 0.95);
}

.auth-tum-hint code {
    font-size: 11px;
    font-family: var(--font-mono);
    background: rgba(0, 26, 46, 0.6);
    padding: 1px 5px;
    border-radius: var(--radius-sm);
    color: var(--tum-bright-web);
}

.auth-switch {
    margin-top: 24px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    text-align: center;
    line-height: 1.5;
}

.auth-link {
    background: none;
    border: none;
    color: var(--tum-bright-web);
    font-weight: 600;
    cursor: pointer;
    padding: 2px 4px;
    margin: -2px -4px;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.auth-link:hover {
    color: var(--tum-white);
    background: rgba(0, 101, 189, 0.2);
}

.auth-link:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

/* TUM bright blue primary CTA */
.btn-auth {
    width: 100%;
    min-height: 52px;
    background: var(--tum-bright-web);
    color: var(--tum-white);
    border: none;
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.03em;
    cursor: pointer;
    border-radius: var(--radius-control);
    transition:
        transform 0.2s ease,
        background 0.2s ease,
        opacity 0.15s ease;
}

.btn-auth:hover:not(:disabled) {
    background: var(--tum-blue-hover);
    transform: translateY(-1px);
}

.btn-auth:active:not(:disabled) {
    transform: translateY(0);
    background: var(--tum-navy);
}

.btn-auth:disabled {
    background: rgba(0, 51, 89, 0.35);
    cursor: not-allowed;
    color: rgba(255, 255, 255, 0.85);
}

.btn-auth:focus-visible {
    outline: 2px solid var(--tum-white);
    outline-offset: 3px;
}

/* Verify email screen */
.verify-email-screen .verify-email-content {
    text-align: center;
}

.verify-email-icon {
    width: 52px;
    height: 52px;
    color: var(--tum-bright-web);
    margin: 0 auto 18px;
    padding: 12px;
    background: rgba(0, 101, 189, 0.15);
    border-radius: var(--radius-control);
    border: 1px solid rgba(0, 101, 189, 0.35);
}

.verify-email-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.55;
    margin-bottom: 14px;
}

.verify-email-desc strong {
    color: var(--tum-white);
    word-break: break-all;
}

.verify-email-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-verify-resend {
    width: 100%;
    background: rgba(255, 255, 255, 0.08);
    color: var(--tum-white);
    border: 1.5px solid rgba(0, 101, 189, 0.45);
    box-shadow: none;
    font-weight: 600;
    border-radius: var(--radius-control);
}

.btn-verify-resend:hover:not(:disabled) {
    background: rgba(0, 101, 189, 0.22);
    border-color: rgba(0, 101, 189, 0.65);
    filter: none;
    transform: none;
}

.btn-verify-back {
    margin-top: 4px;
    font-size: 14px;
}

@media (max-width: 900px) {
    .auth-layout {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .auth-brand-panel {
        align-items: center;
        text-align: center;
        padding: 28px 24px 20px;
        min-height: 0;
    }

    .auth-brand-panel__logo {
        margin-left: auto;
        margin-right: auto;
        max-width: 200px;
    }

    .auth-main-panel {
        min-height: 0;
        flex: 1;
        align-items: flex-start;
        padding: 20px 20px 40px;
    }
}

/* Fixed theme toggle on intro + login / verify (hidden when main app is visible) */
.btn-theme--guest {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 10001;
    border: none;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    width: auto;
    height: auto;
    padding: 0.24rem;
    color: var(--tum-white);
}

body:has(#appContent:not([hidden])) .btn-theme--guest {
    display: none !important;
}

html[data-theme="light"] .btn-theme--guest {
    border-color: transparent;
    background: transparent;
    color: var(--tum-text);
}

html[data-theme="light"] .btn-theme--guest:hover {
    background: transparent;
    border-color: transparent;
}

html[data-theme="dark"] .btn-theme--guest {
    border-color: transparent;
    background: transparent;
    color: var(--tum-white);
}

html[data-theme="dark"] .btn-theme--guest:hover {
    background: transparent;
    border-color: transparent;
}

.btn-theme--guest svg {
    width: 1.45rem;
    height: 1.45rem;
}

html[data-theme="light"] .btn-theme--guest:focus-visible {
    outline-color: var(--tum-bright);
}

/* Intro + auth screens — light theme */
html[data-theme="light"] .intro-splash,
html[data-theme="light"] .auth-screen {
    background-color: var(--color-bg);
    background-image: none;
    background-attachment: fixed;
}

html[data-theme="light"] .auth-brand-panel {
    background: var(--tum-navy);
    color: var(--tum-white);
    border-right: 1px solid rgba(0, 0, 0, 0.12);
}

html[data-theme="light"] .auth-card {
    background: var(--tum-white);
    border: 1px solid var(--tum-border);
}

html[data-theme="light"] .auth-screen.auth-screen--visible .auth-card:hover {
    border-color: rgba(0, 101, 189, 0.45);
}

html[data-theme="light"] .auth-form-title {
    color: var(--tum-text);
}

html[data-theme="light"] .auth-main-panel__header {
    color: var(--tum-bright);
}

html[data-theme="light"] .auth-form label {
    color: rgba(0, 51, 89, 0.88);
}

html[data-theme="light"] .auth-form input {
    color: var(--tum-text);
    background: var(--tum-white);
    border-color: var(--tum-border);
}

html[data-theme="light"] .auth-form input::placeholder {
    color: rgba(0, 51, 89, 0.45);
}

html[data-theme="light"] .auth-form input:hover {
    border-color: rgba(0, 101, 189, 0.45);
    background: rgba(0, 101, 189, 0.03);
}

html[data-theme="light"] .auth-form input:focus {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
    border-color: var(--tum-bright-web);
    background: var(--tum-white);
}

html[data-theme="light"] .password-toggle {
    color: rgba(0, 51, 89, 0.5);
}

html[data-theme="light"] .password-toggle:hover {
    color: var(--tum-text);
    background: rgba(0, 101, 189, 0.1);
}

html[data-theme="light"] .auth-error {
    color: var(--tum-text);
    background: rgba(0, 101, 189, 0.08);
    border-color: rgba(0, 101, 189, 0.35);
}

html[data-theme="light"] .auth-success {
    color: var(--tum-text);
    background: rgba(0, 101, 189, 0.06);
    border-color: rgba(0, 101, 189, 0.3);
}

html[data-theme="light"] .auth-form-desc,
html[data-theme="light"] .auth-switch {
    color: rgba(0, 51, 89, 0.78);
}

html[data-theme="light"] .auth-tum-hint {
    background: rgba(0, 101, 189, 0.06);
    border-color: rgba(0, 101, 189, 0.28);
    color: var(--tum-text);
}

html[data-theme="light"] .auth-tum-hint code {
    background: rgba(0, 51, 89, 0.06);
    color: var(--tum-bright);
}

html[data-theme="light"] .auth-link {
    color: var(--tum-bright);
}

html[data-theme="light"] .auth-link:hover {
    color: var(--tum-text);
    background: rgba(0, 101, 189, 0.08);
}

html[data-theme="light"] .btn-auth:focus-visible {
    outline-color: var(--tum-bright);
}

html[data-theme="light"] .verify-email-icon {
    color: var(--tum-bright);
    background: rgba(0, 101, 189, 0.08);
    border-color: rgba(0, 101, 189, 0.3);
}

html[data-theme="light"] .verify-email-desc {
    color: rgba(0, 51, 89, 0.85);
}

html[data-theme="light"] .verify-email-desc strong {
    color: var(--tum-text);
}

html[data-theme="light"] .btn-verify-resend {
    background: rgba(255, 255, 255, 0.9);
    color: var(--tum-text);
    border-color: rgba(0, 101, 189, 0.4);
}

html[data-theme="light"] .btn-verify-resend:hover:not(:disabled) {
    background: rgba(0, 101, 189, 0.08);
    border-color: rgba(0, 101, 189, 0.55);
}

/* Intro splash — light */
html[data-theme="light"] .intro-splash__bg {
    background: transparent;
    opacity: 0;
}

html[data-theme="light"] .intro-splash__tum {
    color: var(--tum-text);
}

html[data-theme="light"] .intro-splash__divider {
    background: var(--tum-bright-web);
}

html[data-theme="light"] .intro-splash__mr {
    color: var(--tum-bright);
}

.header-toolbar {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.btn-files.upload-receive-pop {
    animation: header-folder-receive 540ms ease-out;
    background: rgba(77, 163, 255, 0.28);
    border-color: rgba(77, 163, 255, 0.85);
    box-shadow: 0 0 0 2px rgba(77, 163, 255, 0.25);
}

@keyframes header-folder-receive {
    0% { transform: scale(1) translateX(0); }
    20% { transform: scale(1.24) translateX(-1px); }
    35% { transform: scale(1.22) translateX(2px); }
    50% { transform: scale(1.16) translateX(-2px); }
    70% { transform: scale(1.1) translateX(1px); }
    100% { transform: scale(1) translateX(0); }
}

.header-upload-message {
    font-size: 0.72rem;
    line-height: 1;
    color: #fff;
    background: rgba(77, 163, 255, 0.22);
    border: 1px solid rgba(77, 163, 255, 0.7);
    padding: 0.24rem 0.42rem;
    white-space: nowrap;
}

.btn-theme {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.08);
    color: var(--tum-white);
    cursor: pointer;
    transition:
        background var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        transform var(--dur-fast) var(--ease-spring);
}

.btn-theme:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

.btn-theme:active {
    transform: translateY(0);
}

.btn-theme:focus-visible {
    outline: 2px solid var(--tum-white);
    outline-offset: 2px;
}

.btn-theme svg {
    width: 1.125rem;
    height: 1.125rem;
}

.header-profile {
    position: relative;
    z-index: 1;
}

.btn-profile {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.65rem 0.35rem 0.35rem;
    background: rgba(255, 255, 255, 0.1);
    color: var(--tum-white);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-ui);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition:
        background var(--dur-fast) var(--ease-out),
        border-color var(--dur-fast) var(--ease-out),
        transform var(--dur-fast) var(--ease-spring);
}

.btn-profile:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.55);
    transform: translateY(-1px);
}

.btn-profile:active {
    transform: translateY(0);
}

.btn-profile:focus-visible {
    outline: 2px solid var(--tum-white);
    outline-offset: 2px;
}

.btn-profile__avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
}

.profile-icon {
    width: 1.125rem;
    height: 1.125rem;
}

.profile-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--app-surface);
    border: 1px solid var(--tum-border);
    border-radius: var(--radius-card);
    min-width: 16rem;
    max-width: min(24rem, 92vw);
    padding: 0;
    z-index: 600;
    overflow: hidden;
    animation: dropdown-in var(--dur-med) var(--ease-out) both;
}

@keyframes dropdown-in {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (prefers-reduced-motion: reduce) {
    .profile-dropdown {
        animation: none;
    }
}

.profile-dropdown__header {
    padding: 1rem 1.125rem;
    background: var(--app-muted);
    border-bottom: 1px solid var(--tum-border);
}

.profile-dropdown__actions {
    padding: 0.35rem 0;
}

.profile-email-label {
    display: block;
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
    margin-bottom: 0.35rem;
}

.profile-email {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--tum-text);
    word-break: break-all;
    line-height: 1.4;
}

.profile-action {
    display: block;
    width: 100%;
    background: none;
    border: none;
    padding: 0.65rem 1.125rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--tum-text);
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: background 0.15s ease, color 0.15s ease;
}

.profile-action:hover {
    background: rgba(0, 101, 189, 0.08);
    color: var(--tum-bright);
}

.profile-logout {
    display: block;
    width: 100%;
    background: none;
    border: none;
    padding: 0.65rem 1.125rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #c62828;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: background 0.15s ease, color 0.15s ease;
}

.profile-logout:hover {
    background: rgba(198, 40, 40, 0.08);
    color: #b71c1c;
}

html[data-theme="dark"] .profile-action:hover {
    background: rgba(0, 101, 189, 0.15);
}

html[data-theme="dark"] .profile-logout {
    color: #ef5350;
}

html[data-theme="dark"] .profile-logout:hover {
    background: rgba(239, 83, 80, 0.15);
    color: #ffcdd2;
}

html {
    background: var(--app-page);
}

/* Splash/auth: match html/body to theme (dark navy vs light page) */
html[data-theme="dark"]:has(#introSplash:not([hidden])),
html[data-theme="dark"]:has(#authScreen:not([hidden])),
html[data-theme="dark"]:has(#verifyEmailScreen:not([hidden])) {
    background: #003359;
}

html[data-theme="light"]:has(#introSplash:not([hidden])),
html[data-theme="light"]:has(#authScreen:not([hidden])),
html[data-theme="light"]:has(#verifyEmailScreen:not([hidden])) {
    background: var(--app-page);
}

body {
    font-family: var(--font-main);
    font-size: 14px;
    background: var(--tum-bg-subtle);
    color: var(--tum-text);
    min-height: 100vh;
    line-height: 1.5;
    overflow-x: hidden;
    transition: background-color 0.35s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html[data-theme="dark"]:has(#introSplash:not([hidden])) body,
html[data-theme="dark"]:has(#authScreen:not([hidden])) body,
html[data-theme="dark"]:has(#verifyEmailScreen:not([hidden])) body {
    background-color: #003359;
}

html[data-theme="light"]:has(#introSplash:not([hidden])) body,
html[data-theme="light"]:has(#authScreen:not([hidden])) body,
html[data-theme="light"]:has(#verifyEmailScreen:not([hidden])) body {
    background-color: var(--app-page);
}

/* Main app (post-login) — TUM, minimal, professional */
.app-wrapper {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(ellipse 120% 80% at 50% -30%, rgba(0, 101, 189, 0.14), transparent 55%),
        radial-gradient(ellipse 70% 50% at 100% 40%, rgba(0, 132, 212, 0.06), transparent 45%),
        var(--tum-bg-subtle);
    position: relative;
    isolation: isolate;
    overflow-x: clip;
}

.app-wrapper::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.55;
    background: radial-gradient(circle at 20% 90%, rgba(0, 101, 189, 0.07), transparent 42%);
}

@media (prefers-reduced-motion: reduce) {
    .app-wrapper::before {
        animation: none;
    }
}

.app-wrapper > .app-main,
.app-wrapper > .app-footer {
    position: relative;
    z-index: 1;
}

/* Must stack above .app-main (also z-index: 1) so profile dropdown is not covered by cards. */
.app-wrapper > .app-header {
    position: relative;
    z-index: 50;
}

.app-header {
    background: var(--tum-navy);
    color: var(--tum-white);
    padding: 0.9rem clamp(1.25rem, 4.5vw, 2.1rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-shrink: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: none;
    position: sticky;
    top: 0;
    z-index: 50;
}

.app-main {
    flex: 1;
    width: 100%;
    max-width: min(1320px, 100%);
    margin: 0 auto;
    padding: clamp(1rem, 2.5vw, 1.75rem) clamp(1rem, 4vw, 2.5rem);
    box-sizing: border-box;
    min-height: 0;
}

/* Main column: upload card, then output / error stacked below */
.app-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1.25rem, 2.5vw, 2rem);
    align-items: start;
    width: 100%;
}

.app-layout__primary {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.app-layout__status {
    grid-column: 1 / -1;
    width: 100%;
    min-width: 0;
}

.app-layout__status .status-bar {
    margin-bottom: 0;
}

@media (max-width: 600px) {
    .app-header {
        flex-wrap: wrap;
    }
    .header-toolbar {
        margin-left: auto;
    }
    .app-main {
        padding: 1rem 1rem 1.5rem;
    }
}

.app-card {
    background: var(--app-surface);
    border: 1px solid var(--tum-border);
    border-radius: var(--radius-card);
    margin-bottom: 0;
    box-shadow: none;
    overflow: hidden;
}

html[data-theme="dark"] .app-card {
    border-color: rgba(0, 101, 189, 0.22);
}

.app-card:hover {
    box-shadow: none;
}

.app-code {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.1rem 0.35rem;
    border-radius: var(--radius-sm);
    background: rgba(0, 101, 189, 0.08);
    color: var(--tum-text);
}

.app-card__body {
    padding: 1.25rem;
}

.app-card__body--upload {
    padding-top: 1rem;
}

.upload-section {
    margin-bottom: 0;
}

/* Workspace shell: no outer “card” — only the stage panel is boxed */
.workspace.app-card {
    background: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
    overflow: visible;
}

html[data-theme="dark"] .workspace.app-card {
    border: none;
    box-shadow: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.workspace__inner {
    padding: clamp(1.15rem, 2.8vw, 2rem) clamp(1rem, 3vw, 2rem);
}

.workspace-hero {
    margin-bottom: clamp(1.25rem, 3vw, 2rem);
    animation: workspaceHeroIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes workspaceHeroIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .workspace-hero {
        animation: none;
    }
}

.workspace-hero__title {
    margin: 0 0 0.6rem;
    font-family: Sora, var(--font-ui);
    font-size: clamp(1.45rem, 3.5vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--color-text);
}

.workspace-hero--minimal {
    margin-bottom: clamp(0.75rem, 2vw, 1.25rem);
}

.workspace-hero--minimal .workspace-hero__title {
    margin: 0;
    font-size: clamp(1.15rem, 2.6vw, 1.5rem);
}

.dropzone {
    border: 2px dashed color-mix(in srgb, var(--tum-border) 85%, var(--tum-bright));
    background: color-mix(in srgb, var(--app-muted) 55%, var(--app-surface));
    padding: clamp(1.1rem, 2.5vw, 1.75rem) clamp(1rem, 2.5vw, 1.5rem);
    text-align: center;
    cursor: pointer;
    margin: 0;
    border-radius: clamp(12px, 1.5vw, 18px);
    transition:
        border-color 0.35s ease,
        background 0.35s ease,
        box-shadow 0.35s ease,
        transform 0.25s ease;
    min-height: 7rem;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: rgba(0, 101, 189, 0.55);
    background: color-mix(in srgb, var(--tum-bright) 10%, var(--app-muted));
    box-shadow: 0 12px 36px rgba(0, 101, 189, 0.12);
    transform: translateY(-2px);
}

@media (prefers-reduced-motion: reduce) {
    .dropzone:hover,
    .dropzone.dragover {
        transform: none;
    }
}

html[data-theme="dark"] .dropzone {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.22);
}

html[data-theme="dark"] .dropzone:hover,
html[data-theme="dark"] .dropzone.dragover {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.34);
}

.dropzone:focus-within {
    outline: 2px solid rgba(0, 101, 189, 0.35);
    outline-offset: 2px;
}

.dropzone-content {
    pointer-events: none;
    margin: 0 auto;
}

.dropzone-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.65rem;
    color: var(--tum-bright);
    opacity: 0.85;
}

.upload-icon {
    width: 2rem;
    height: 2rem;
    display: block;
}

.dropzone:hover .dropzone-icon-wrap,
.dropzone.dragover .dropzone-icon-wrap {
    opacity: 1;
}

.dropzone-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--tum-text);
    margin: 0;
}

.file-list {
    margin: 1rem 0 0;
    border: 1px solid var(--tum-border);
    background: var(--app-surface);
    border-radius: var(--radius-control);
    overflow: hidden;
}

.file-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 1rem;
    background: var(--app-muted);
    border-bottom: 1px solid var(--tum-border);
}

.file-list-title {
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
}

.file-list-count {
    font-weight: 600;
    color: var(--tum-text);
    margin-left: 0.25rem;
}

.file-items {
    max-height: 11rem;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-bottom: 1px solid var(--tum-border);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    transition: background var(--dur-fast) var(--ease-out);
}

.file-item:hover {
    background: rgba(0, 101, 189, 0.05);
}

html[data-theme="dark"] .file-item:hover {
    background: rgba(0, 101, 189, 0.12);
}

.file-item:last-child {
    border-bottom: none;
}

.file-item-col-name {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
}

.file-item-name {
    color: var(--tum-text);
    flex: 1;
    min-width: 0;
}

.file-item-actions {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    flex-shrink: 0;
}

.file-item-size {
    color: var(--tum-text-soft);
    font-size: 0.75rem;
    flex-shrink: 0;
}

.file-item-remove {
    background: none;
    border: none;
    color: var(--tum-text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 1;
    padding: 0.15rem 0.35rem;
    border-radius: var(--radius-sm);
    transition: color 0.15s ease, background 0.15s ease;
}

.file-item-remove:hover {
    color: var(--tum-bright);
    background: rgba(0, 101, 189, 0.08);
}

.file-item-remove--trash {
    color: #c62828;
}
.file-item-remove--trash:hover {
    color: #b71c1c;
    background: rgba(198, 40, 40, 0.12);
}
.file-item-remove--trash .icon-trash {
    width: 1.05rem;
    height: 1.05rem;
    display: block;
}
html[data-theme="dark"] .file-item-remove--trash {
    color: #ef5350;
}
html[data-theme="dark"] .file-item-remove--trash:hover {
    color: #ffab91;
    background: rgba(239, 83, 80, 0.15);
}

.btn-clear {
    background: none;
    border: none;
    color: var(--tum-bright);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease;
}

.btn-clear:hover {
    background: rgba(0, 101, 189, 0.1);
}

.btn-convert {
    width: 100%;
    max-width: 20rem;
    margin-left: auto;
    margin-right: auto;
    justify-content: center;
    background: var(--tum-navy);
    color: var(--tum-white);
    border: 1px solid var(--tum-navy);
    padding: 0.75rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-ui);
    letter-spacing: 0.01em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 12px;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.12s ease, box-shadow 0.12s ease;
    box-shadow: 0 4px 0 rgba(0, 51, 89, 0.35);
}

.btn-convert:hover:not(:disabled) {
    background: var(--tum-blue-hover);
    border-color: var(--tum-blue-hover);
    transform: translateY(-1px);
}

.btn-convert:active:not(:disabled) {
    background: #002a45;
    border-color: #002a45;
    transform: translateY(1px);
    box-shadow: 0 2px 0 rgba(0, 51, 89, 0.25);
}

.btn-convert:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

.btn-convert:disabled {
    background: var(--app-muted);
    border-color: var(--tum-border);
    color: var(--tum-text-muted);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* Conversion flow — timeline flush left (no box), stage is the only panel */
.app-card__body--flow {
    position: relative;
    overflow: visible;
}

.workspace-flow {
    --flow-progress: 0;
    --timeline-marker: clamp(3.1rem, 5.2vw, 3.65rem);
    display: grid;
    grid-template-columns: var(--timeline-marker) minmax(0, 1fr);
    gap: clamp(1rem, 2.8vw, 1.85rem);
    align-items: stretch;
}

.workspace-flow__main {
    min-width: 0;
    min-height: min(52vh, 560px);
    display: flex;
    flex-direction: column;
}

.workspace-results {
    min-height: min(52vh, 560px);
    display: flex;
    flex-direction: column;
    padding: 0.1rem 0 0.25rem;
}

.workspace-results[hidden] {
    display: none !important;
}

.conversion-result {
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    animation: conversionResultEnter 0.42s var(--ease-out) both;
}

@keyframes conversionResultEnter {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.conversion-result__hero {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.1rem 1.15rem;
    border-radius: 14px;
    border: 1px solid color-mix(in srgb, var(--tum-bright-web) 38%, var(--tum-border));
    background: linear-gradient(
        135deg,
        color-mix(in srgb, var(--tum-bright-web) 16%, var(--app-surface)) 0%,
        color-mix(in srgb, var(--tum-bright-web) 6%, var(--app-surface)) 55%,
        var(--app-surface) 100%
    );
    box-shadow:
        0 1px 0 color-mix(in srgb, #fff 40%, transparent) inset,
        0 12px 36px color-mix(in srgb, var(--tum-bright-web) 12%, transparent);
}

html[data-theme="dark"] .conversion-result__hero {
    background: linear-gradient(
        135deg,
        color-mix(in srgb, var(--tum-bright-web) 22%, var(--app-muted)) 0%,
        color-mix(in srgb, var(--tum-bright-web) 8%, var(--app-surface)) 60%,
        var(--app-surface) 100%
    );
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
}

.conversion-result__hero-icon {
    flex-shrink: 0;
    width: 3.25rem;
    height: 3.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--tum-bright-web);
    background: color-mix(in srgb, var(--tum-bright-web) 14%, var(--app-surface));
}

.conversion-result__hero-icon svg {
    width: 100%;
    height: 100%;
}

.conversion-result__hero-ring {
    opacity: 0.35;
}

.conversion-result__hero-check {
    stroke-dasharray: 40;
    stroke-dashoffset: 40;
    transition: stroke-dashoffset 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.1s;
}

.conversion-result__hero-check.is-drawn {
    stroke-dashoffset: 0;
}

.conversion-result__hero-text {
    min-width: 0;
    padding-top: 0.15rem;
}

.conversion-result__eyebrow {
    margin: 0 0 0.2rem;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--tum-bright-web);
}

.conversion-result__title {
    margin: 0 0 0.35rem;
    font-family: Sora, var(--font-ui);
    font-size: clamp(1.15rem, 2.4vw, 1.45rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: var(--color-text);
}

.conversion-result__subtitle {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.45;
    color: var(--tum-text-muted);
}

.conversion-result__stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem;
}

@media (min-width: 640px) {
    .conversion-result__stats {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.conversion-stat {
    padding: 0.65rem 0.75rem;
    border-radius: 10px;
    border: 1px solid color-mix(in srgb, var(--tum-border) 80%, transparent);
    background: var(--app-surface);
    text-align: left;
}

.conversion-stat__label {
    display: block;
    margin-bottom: 0.28rem;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
}

.conversion-stat__value {
    display: block;
    font-size: 0.86rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversion-stat__value--mono {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
}

.conversion-result__edit {
    padding: 1rem 1.05rem;
    border-radius: 12px;
    border: 1px dashed color-mix(in srgb, var(--tum-bright-web) 45%, var(--tum-border));
    background: color-mix(in srgb, var(--tum-bright-web) 6%, var(--app-muted));
}

.conversion-result__edit.is-picker-open {
    border-style: solid;
    border-color: color-mix(in srgb, var(--tum-bright-web) 55%, var(--tum-border));
    background: color-mix(in srgb, var(--tum-bright-web) 10%, var(--app-surface));
}

.conversion-result__edit-title {
    margin: 0 0 0.35rem;
    font-family: Sora, var(--font-ui);
    font-size: 0.95rem;
    font-weight: 650;
    color: var(--color-text);
}

.conversion-result__edit-lead {
    margin: 0 0 0.85rem;
    font-size: 0.82rem;
    line-height: 1.45;
    color: var(--tum-text-muted);
}

.conversion-result__edit-rows {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 9.5rem), 1fr));
    gap: 0.75rem 0.85rem;
    margin-bottom: 0.85rem;
    align-items: start;
}

.conversion-result__edit-row {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    min-width: 0;
}

.conversion-result__edit-row.is-picker-open {
    gap: 0.45rem;
}

.conversion-result__edit-row-label {
    margin: 0;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
}

.conversion-result__edit-row-current {
    margin: 0;
    font-size: 0.86rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--color-text);
    font-family: var(--font-mono);
}

.conversion-result__edit-row-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    gap: 0.55rem;
}

.conversion-result__edit-row-actions .conversion-result__change-picker {
    width: 100%;
    justify-content: center;
}

.conversion-result__change-picker {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 0.95rem;
    font-family: var(--font-ui);
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--tum-bright-web);
    background: var(--app-surface);
    border: 1.5px solid color-mix(in srgb, var(--tum-bright-web) 50%, var(--tum-border));
    border-radius: 10px;
    cursor: pointer;
    transition:
        background var(--dur-fast) ease,
        border-color var(--dur-fast) ease,
        transform var(--dur-fast) var(--ease-spring);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--tum-bright-web) 12%, transparent);
}

.conversion-result__change-picker svg {
    width: 1.1rem;
    height: 1.1rem;
    flex-shrink: 0;
}

.conversion-result__change-picker:hover {
    background: color-mix(in srgb, var(--tum-bright-web) 10%, var(--app-surface));
    border-color: var(--tum-bright-web);
    transform: translateY(-1px);
}

.conversion-result__change-picker:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

.conversion-result__picker-select {
    width: 100%;
    min-width: 0;
}

.conversion-result__edit-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem 0.75rem;
}

.conversion-result__edit-run {
    flex: 1 1 14rem;
    min-width: min(100%, 14rem);
    max-width: 22rem;
}

.conversion-result__edit-run .flow-submit {
    width: 100%;
}

.conversion-result__edit-hint {
    margin: 0;
    font-size: 0.8rem;
    color: var(--tum-text-muted);
}

.conversion-result__footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem 1rem;
    padding-top: 0.35rem;
    margin-top: 0.15rem;
    border-top: 1px solid color-mix(in srgb, var(--tum-border) 65%, transparent);
}

.conversion-result__new-run {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 2.65rem;
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
    border-radius: 12px;
    box-shadow: 0 4px 16px color-mix(in srgb, var(--tum-bright-web) 28%, transparent);
}

.conversion-result__new-run svg {
    width: 1.05rem;
    height: 1.05rem;
    flex-shrink: 0;
}

.conversion-result__new-run:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 22px color-mix(in srgb, var(--tum-bright-web) 35%, transparent);
}

.conversion-result__upload {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

@media (max-width: 520px) {
    .conversion-result__footer {
        flex-direction: column;
        align-items: stretch;
    }

    .conversion-result__new-run {
        width: 100%;
    }

    .conversion-result__upload {
        margin-left: 0;
        width: 100%;
    }

    .conversion-stat__value {
        white-space: normal;
    }
}

@media (prefers-reduced-motion: reduce) {
    .conversion-result {
        animation: none;
    }

    .conversion-result__hero-check {
        stroke-dashoffset: 0;
        transition: none;
    }
}

.workspace-timeline {
    position: relative;
    align-self: stretch;
    min-height: min(52vh, 560px);
    height: 100%;
    display: grid;
    grid-template-rows: repeat(4, 1fr);
    grid-template-columns: 1fr;
    padding: 0;
    margin: 0;
    background: transparent;
}

.workspace-timeline__rail {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 12.5%;
    bottom: 12.5%;
    width: 4px;
    z-index: 0;
    pointer-events: none;
}

.workspace-timeline__track-bg {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: color-mix(in srgb, var(--app-muted) 88%, var(--tum-border));
}

.workspace-timeline__track-fill {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        180deg,
        var(--tum-bright),
        color-mix(in srgb, var(--tum-bright) 55%, #7ecbff)
    );
    transform: scaleY(var(--flow-progress, 0));
    transform-origin: top center;
    transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-reduced-motion: reduce) {
    .workspace-timeline__track-fill {
        transition: none;
    }
}

.workspace-timeline__nodes {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
    z-index: 1;
    display: contents;
}

.timeline-node {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-ui);
    transition:
        opacity 0.38s ease,
        filter 0.38s ease,
        transform 0.38s ease;
}

.timeline-node.is-muted {
    opacity: 0.4;
    filter: saturate(0.3);
}

.timeline-node.is-active {
    opacity: 1;
    filter: none;
}

.timeline-node__marker {
    width: var(--timeline-marker);
    height: var(--timeline-marker);
    max-width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: clamp(1rem, 2.4vw, 1.2rem);
    font-weight: 800;
    line-height: 1;
    border: 3px solid color-mix(in srgb, var(--tum-bright) 42%, var(--tum-border));
    background: color-mix(in srgb, var(--tum-bright) 8%, var(--tum-bg-subtle));
    color: var(--tum-navy);
    box-sizing: border-box;
    transition:
        background 0.35s ease,
        border-color 0.35s ease,
        color 0.35s ease,
        box-shadow 0.35s ease,
        transform 0.3s ease;
}

html[data-theme="dark"] .timeline-node__marker {
    color: var(--color-text);
    background: color-mix(in srgb, var(--app-muted) 70%, transparent);
}

.timeline-node.is-muted .timeline-node__marker {
    background: var(--app-muted);
    color: var(--tum-text-muted);
    border-color: var(--tum-border);
    box-shadow: none;
    transform: scale(0.94);
}

.timeline-node.is-active .timeline-node__marker {
    background: var(--tum-bright);
    color: #fff;
    border-color: color-mix(in srgb, var(--tum-bright) 78%, #000);
    box-shadow:
        0 6px 22px rgba(0, 101, 189, 0.38),
        0 0 0 1px rgba(0, 101, 189, 0.12);
    transform: scale(1);
}

@media (max-width: 680px) {
    .workspace-flow {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }

    .workspace-flow__main {
        min-height: 0;
    }

    .workspace-timeline {
        min-height: auto;
        height: auto;
        grid-template-rows: auto;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 0.35rem;
    }

    .workspace-timeline__rail {
        display: none;
    }

    .timeline-node {
        min-width: 0;
    }

    .timeline-node__marker {
        width: clamp(2.5rem, 18vw, 3rem);
        height: clamp(2.5rem, 18vw, 3rem);
        margin: 0 auto;
    }
}

.workspace-stage {
    position: relative;
    z-index: 0;
    flex: 1;
    margin-top: 0;
    padding: clamp(1.15rem, 2.5vw, 2rem);
    border-radius: clamp(14px, 2vw, 22px);
    border: 1px solid color-mix(in srgb, var(--tum-border) 75%, transparent);
    background: linear-gradient(
        160deg,
        color-mix(in srgb, var(--app-surface) 97%, rgba(0, 101, 189, 0.09)),
        var(--app-surface) 42%,
        color-mix(in srgb, var(--app-muted) 35%, var(--app-surface)) 100%
    );
    box-shadow:
        0 4px 6px -1px rgba(0, 51, 89, 0.07),
        0 16px 40px -14px rgba(0, 51, 89, 0.14),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    min-height: min(52vh, 560px);
}

html[data-theme="dark"] .workspace-stage {
    box-shadow:
        0 8px 28px rgba(0, 0, 0, 0.35),
        inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.flow-panels {
    min-height: 14rem;
    position: relative;
}

.flow-step {
    opacity: 1;
}

.flow-step.flow-step--leave {
    animation: flowStepLeave 240ms ease forwards;
    pointer-events: none;
}

.flow-step.flow-step--enter {
    animation: flowStepEnter 280ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes flowStepLeave {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-8px);
    }
}

@keyframes flowStepEnter {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.flow-step__title {
    font-family: Sora, var(--font-ui);
    font-size: clamp(1.08rem, 2vw, 1.35rem);
    font-weight: 700;
    margin: 0 0 0.45rem;
    color: var(--color-text);
    letter-spacing: -0.03em;
}

.flow-step__lead {
    margin: 0 0 clamp(1rem, 2vw, 1.35rem);
    font-size: clamp(0.88rem, 1.4vw, 0.98rem);
    line-height: 1.55;
    color: var(--tum-text-muted);
    max-width: 52rem;
}

.flow-field {
    margin-bottom: 0.9rem;
}

.flow-field label {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
    margin-bottom: 0.4rem;
}

.flow-optional {
    text-transform: none;
    font-weight: 500;
    letter-spacing: 0;
    font-size: 0.7rem;
    opacity: 0.9;
}

.flow-field--trajectory-vars .flow-field-label-visual {
    margin-bottom: 0.45rem;
}

.trajectory-var-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.4rem;
}

.trajectory-var-chip {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    padding: 0.95rem 1.15rem;
    min-width: 9.5rem;
    max-width: 100%;
    border: 1px solid var(--tum-border);
    border-radius: 12px;
    background: var(--app-input-bg);
    color: var(--tum-text);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.3;
    text-align: left;
    cursor: pointer;
    transition:
        border-color 0.15s ease,
        box-shadow 0.15s ease,
        background 0.15s ease;
}

.trajectory-var-chip:hover {
    border-color: var(--tum-bright-web);
}

.trajectory-var-chip:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

.trajectory-var-chip--selected {
    border-color: var(--tum-bright-web);
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--tum-bright-web) 55%, transparent);
    background: color-mix(in srgb, var(--tum-bright-web) 12%, var(--app-input-bg));
}

.trajectory-var-chip__name {
    font-weight: 600;
    word-break: break-all;
}

.trajectory-var-chip__dim {
    font-size: 0.8rem;
    opacity: 0.78;
    font-weight: 500;
}

.trajectory-var-chips__hint {
    margin: 0;
    font-size: 0.78rem;
    color: var(--tum-text-muted);
    line-height: 1.45;
}

.flow-select,
.flow-input {
    width: 100%;
    max-width: 100%;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--tum-border);
    border-radius: 10px;
    font-size: 0.875rem;
    font-family: var(--font-mono);
    background: var(--app-input-bg);
    color: var(--tum-text);
}

.flow-input:focus,
.flow-select:focus {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 1px;
    border-color: var(--tum-bright-web);
}

.flow-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: 1.15rem;
}

.flow-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--tum-border);
    background: var(--app-muted);
    color: var(--tum-text);
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.flow-btn:hover:not(:disabled) {
    background: var(--app-input-bg);
    border-color: rgba(0, 101, 189, 0.35);
}

.flow-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.flow-btn--primary {
    background: var(--tum-bright);
    color: #fff;
    border-color: var(--tum-bright);
    box-shadow: 0 2px 0 rgba(0, 51, 89, 0.2);
}

.flow-btn--primary:hover:not(:disabled) {
    background: var(--tum-blue-hover);
    border-color: var(--tum-blue-hover);
    color: #fff;
}

.flow-btn--ghost {
    background: transparent;
    border: 1px dashed var(--tum-border);
}

.flow-run-wrap {
    margin-top: 1.35rem;
}

.flow-submit {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.95rem 1.1rem;
    border-radius: 14px;
    border: 1px solid color-mix(in srgb, var(--tum-bright) 45%, var(--tum-border));
    background: linear-gradient(135deg, color-mix(in srgb, var(--tum-bright) 12%, var(--app-surface)), var(--app-surface));
    color: var(--color-text);
    cursor: pointer;
    font-family: var(--font-ui);
    text-align: left;
    transition:
        transform 0.18s ease,
        box-shadow 0.18s ease,
        border-color 0.18s ease,
        opacity 0.18s ease;
    box-shadow: 0 6px 22px rgba(0, 51, 89, 0.12);
}

.flow-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(0, 51, 89, 0.18);
    border-color: var(--tum-bright-web);
}

.flow-submit:active:not(:disabled) {
    transform: translateY(0);
}

.flow-submit:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 3px;
}

.flow-submit:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.flow-submit.is-busy {
    pointer-events: none;
    opacity: 0.92;
}

.flow-submit__main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.flow-submit__title {
    font-family: Sora, var(--font-ui);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.flow-submit__chevron {
    flex-shrink: 0;
    font-size: 1.35rem;
    font-weight: 300;
    color: var(--tum-bright);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.flow-submit.is-busy .flow-submit__chevron {
    opacity: 0;
    transform: translateX(4px);
}

.flow-loading {
    position: absolute;
    inset: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.flow-loading[hidden] {
    display: none !important;
}

.flow-loading__backdrop {
    position: absolute;
    inset: 0;
    background: color-mix(in srgb, var(--color-bg) 80%, #0000);
    backdrop-filter: blur(3px);
}

.flow-loading__sheet {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 22rem;
    padding: 1.35rem 1.35rem 1.2rem;
    background: var(--app-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.14);
}

html[data-theme="dark"] .flow-loading__sheet {
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.55);
}

.flow-loading__title {
    font-family: Sora, var(--font-ui);
    font-size: 1.02rem;
    font-weight: 700;
    margin: 0 0 0.85rem;
    color: var(--color-text);
}

.flow-loading__track {
    height: 4px;
    border-radius: 999px;
    background: var(--app-muted);
    overflow: hidden;
    margin-bottom: 0.85rem;
}

.flow-loading__progress {
    height: 100%;
    width: 35%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--tum-bright), color-mix(in srgb, var(--tum-bright) 65%, #fff));
    animation: flowLoadBar 1.35s ease-in-out infinite;
}

@keyframes flowLoadBar {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(320%);
    }
}

.flow-loading__sub {
    margin: 0;
    font-size: 0.8rem;
    color: var(--tum-text-muted);
    line-height: 1.45;
}

/* Robot carousel (step 2) + identity card (step 3) */
.flow-field--robot-model-dropdown,
.flow-field--gripper-model-dropdown {
    margin-bottom: 0.35rem;
}

.flow-field--gripper-picker {
    position: relative;
    overflow: visible;
}

.flow-field--robot-picker {
    position: relative;
    overflow: visible;
}

.robot-picker {
    margin-bottom: 0.65rem;
}

.robot-carousel {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: stretch;
    gap: clamp(0.25rem, 1.5vw, 0.65rem);
    max-width: 36rem;
    margin: 0 auto;
    overflow: visible;
}

.robot-carousel__chev {
    align-self: center;
    width: 2.35rem;
    height: 2.35rem;
    padding: 0;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--tum-border) 80%, transparent);
    background: var(--app-surface);
    color: var(--tum-bright-web);
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition:
        background 0.2s ease,
        border-color 0.2s ease,
        color 0.2s ease,
        transform 0.2s ease;
}

.robot-carousel__chev:hover {
    border-color: color-mix(in srgb, var(--tum-bright-web) 45%, var(--tum-border));
    background: color-mix(in srgb, var(--tum-bright-web) 10%, var(--app-surface));
}

.robot-carousel__chev:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

.robot-carousel__chev:active {
    transform: scale(0.96);
}

.robot-carousel__viewport {
    position: relative;
    min-width: 0;
    /* Clip horizontal slide only; keep vertical room for the active glow */
    overflow-x: hidden;
    overflow-y: visible;
    outline: none;
    border-radius: 16px;
    padding: 2.25rem 0 0.65rem;
}

.robot-carousel__viewport:focus-visible {
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--tum-bright-web) 35%, transparent);
}

.robot-carousel__track {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.robot-carousel__track--instant {
    transition: none !important;
}

.robot-carousel__cell {
    flex-shrink: 0;
    box-sizing: border-box;
    margin: 0;
    padding: 0.15rem 0.3rem 0.45rem;
    border: none;
    background: transparent;
    cursor: pointer;
    text-align: center;
    color: inherit;
    overflow: visible;
    -webkit-tap-highlight-color: transparent;
}

.robot-carousel__cell:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 4px;
    border-radius: 14px;
}

.robot-carousel__cell-inner {
    display: block;
    overflow: visible;
    transform-origin: center center;
    transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1), filter 0.45s ease;
    transform: scale(0.86);
    filter: saturate(0.92);
}

.robot-carousel__cell.is-active .robot-carousel__cell-inner {
    transform: scale(1);
    filter: saturate(1);
}

.robot-carousel--single .robot-carousel__cell-inner {
    transform: scale(1);
    filter: saturate(1);
}

.robot-carousel__figure {
    position: relative;
    display: block;
    aspect-ratio: 1;
    margin: 0 auto;
    max-width: min(9.5rem, 30vw);
    overflow: visible;
    isolation: isolate;
}

/* Soft light behind the centre (active) robot — matches step 3 identity glow */
.robot-carousel__cell.is-active .robot-carousel__figure::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: min(17rem, 88vw);
    height: min(15rem, 52vw);
    transform: translate(-50%, -50%);
    z-index: 0;
    pointer-events: none;
    background: radial-gradient(
        ellipse 72% 58% at 50% 50%,
        color-mix(in srgb, var(--tum-bright-web) 26%, transparent),
        color-mix(in srgb, var(--tum-bright) 12%, transparent) 52%,
        transparent 72%
    );
    opacity: 0.52;
}

.robot-carousel__cell.is-active .robot-carousel__figure {
    max-width: min(11rem, 36vw);
}

.robot-carousel--single .robot-carousel__figure {
    max-width: min(12rem, 70vw);
}

.robot-carousel__img {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    padding: 0.1rem;
    border-radius: 12px;
    filter: drop-shadow(0 12px 20px rgba(0, 51, 89, 0.2))
        drop-shadow(0 4px 8px rgba(0, 0, 0, 0.07));
}

html[data-theme="dark"] .robot-carousel__img {
    filter: drop-shadow(0 14px 26px rgba(0, 0, 0, 0.5)) drop-shadow(0 4px 10px rgba(0, 0, 0, 0.28));
}

.robot-carousel__caption {
    display: block;
    margin-top: 0.35rem;
    font-family: Sora, var(--font-ui);
    font-size: clamp(0.62rem, 2.1vw, 0.74rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-text);
    padding: 0 0.1rem;
}

.robot-carousel__cell.is-active .robot-carousel__caption {
    font-size: clamp(0.74rem, 2.4vw, 0.88rem);
    margin-top: 0.42rem;
}

.robot-carousel [hidden] {
    display: none !important;
}

.flow-field-label-visual {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
    margin-bottom: 0.5rem;
}

/* Step 4 gripper + Step 5 naming — checklist + large output filename */
#flowStep4Gripper:not([hidden]) .flow-step-meta,
#flowStep5:not([hidden]) .flow-step-meta {
    opacity: 0.82;
    transform: scale(0.94);
    transform-origin: left top;
}

#flowStep4Gripper:not([hidden]) .flow-step__title,
#flowStep5:not([hidden]) .flow-step__title {
    font-size: clamp(0.92rem, 1.8vw, 1.08rem);
    margin-bottom: 0.28rem;
    color: var(--tum-text-muted);
    font-weight: 650;
}

#flowStep5:not([hidden]) .flow-step4__lead {
    font-size: clamp(0.76rem, 1.35vw, 0.86rem);
    margin-bottom: 0.5rem;
    line-height: 1.42;
    max-width: 34rem;
}

.flow-step4-checklist {
    list-style: none;
    margin: 0 0 1rem;
    padding: 0.35rem 0.5rem 0;
    max-width: 40rem;
    width: 100%;
    border: 1px solid var(--tum-border);
    border-radius: 10px;
    background: color-mix(in srgb, var(--app-muted) 40%, var(--app-surface));
    overflow: hidden;
}

.flow-step4-checklist__item {
    display: grid;
    grid-template-columns: 1.35rem 1fr;
    column-gap: 0.65rem;
    align-items: start;
    padding: 0.5rem 0;
    min-height: 3.65rem;
    box-sizing: border-box;
}

.flow-step4-checklist__item--output {
    grid-template-rows: auto auto;
}

.flow-step4-checklist__body {
    grid-column: 2;
    grid-row: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.18rem;
    justify-content: center;
    padding-top: 0.06rem;
}

.flow-step4-checklist__check {
    grid-column: 1;
    grid-row: 1;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.35rem;
    height: 1.35rem;
    margin-top: 0.22rem;
    border-radius: 50%;
    font-size: 0.62rem;
    font-weight: 800;
    line-height: 1;
    color: #fff;
    background: color-mix(in srgb, var(--tum-bright-web) 78%, var(--tum-bright));
}

.flow-step4-checklist__label {
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--tum-text);
    letter-spacing: 0.01em;
}

label.flow-step4-checklist__label {
    cursor: pointer;
}

.flow-step4-checklist__sub {
    font-size: 0.78rem;
    line-height: 1.35;
    color: var(--tum-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.flow-step4-checklist__item--output .flow-step4-checklist__output-input {
    grid-column: 1 / -1;
    grid-row: 2;
    margin-top: 0.35rem;
    width: 100%;
    min-height: 2.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-mono);
    padding: 0.5rem 0.65rem;
    border-width: 1.5px;
    border-color: color-mix(in srgb, var(--tum-bright-web) 45%, var(--tum-border));
    background: var(--app-surface);
    box-shadow: inset 0 1px 2px color-mix(in srgb, var(--tum-bright-web) 6%, transparent);
}

.flow-step4-checklist__output-input::placeholder {
    font-weight: 500;
    font-size: 0.85rem;
    opacity: 0.72;
}

.flow-step4-checklist__output-input:focus {
    outline: none;
    border-color: var(--tum-bright-web);
    box-shadow:
        inset 0 1px 2px color-mix(in srgb, var(--tum-bright-web) 8%, transparent),
        0 0 0 3px color-mix(in srgb, var(--tum-bright-web) 22%, transparent);
}

.flow-step4-checklist__item + .flow-step4-checklist__item {
    border-top: 1px solid color-mix(in srgb, var(--tum-border) 65%, transparent);
}

.flow-step4-checklist__check--pending {
    color: var(--tum-text-muted);
    background: transparent;
    border: 2px solid color-mix(in srgb, var(--tum-border) 85%, var(--tum-text-muted));
    font-size: 0.55rem;
    font-weight: 700;
}

.flow-step4-checklist__item--output.is-done .flow-step4-checklist__check {
    border: none;
    font-size: 0.62rem;
    color: #fff;
    background: color-mix(in srgb, var(--tum-bright-web) 78%, var(--tum-bright));
}

.flow-step4-run {
    margin-bottom: 0.65rem;
    margin-top: 0.35rem;
}

#flowStep4Gripper:not([hidden]) .flow-nav .flow-btn,
#flowStep5:not([hidden]) .flow-nav .flow-btn {
    font-size: 0.8rem;
    padding: 0.38rem 0.6rem;
}

.flow-step4-run .flow-submit:disabled {
    opacity: 0.38;
    filter: grayscale(0.35);
    border-color: var(--tum-border);
    background: color-mix(in srgb, var(--app-muted) 65%, var(--app-surface));
    box-shadow: none;
}

.flow-step4-run .flow-submit:disabled .flow-submit__chevron {
    color: var(--tum-text-muted);
    opacity: 0.65;
}

.flow-step4-run .flow-submit:disabled .flow-submit__title {
    color: var(--tum-text-muted);
}

html[data-theme="dark"] .flow-step4-checklist {
    background: color-mix(in srgb, var(--app-input-bg) 55%, var(--app-surface));
    border-color: color-mix(in srgb, var(--tum-border) 88%, transparent);
}

html[data-theme="dark"] .flow-step4-checklist__output-input {
    background: var(--app-input-bg);
    border-color: color-mix(in srgb, var(--tum-bright-web) 42%, var(--tum-border));
}

html[data-theme="dark"] .flow-step4-checklist__output-input:focus {
    box-shadow:
        inset 0 1px 2px color-mix(in srgb, var(--tum-bright-web) 12%, transparent),
        0 0 0 3px color-mix(in srgb, var(--tum-bright-web) 26%, transparent);
}

html[data-theme="dark"] .flow-step4-run .flow-submit:disabled {
    background: color-mix(in srgb, var(--app-input-bg) 72%, var(--app-muted));
    border-color: color-mix(in srgb, var(--tum-border) 80%, transparent);
}

/* Post-conversion celebration overlay */
.flow-celebration {
    position: absolute;
    inset: 0;
    z-index: 6;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    pointer-events: none;
}

.flow-celebration[hidden] {
    display: none !important;
}

.flow-celebration.is-visible {
    pointer-events: auto;
}

.flow-celebration__backdrop {
    position: absolute;
    inset: 0;
    background: color-mix(in srgb, var(--color-bg) 78%, #0000);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.flow-celebration.is-visible .flow-celebration__backdrop {
    opacity: 1;
}

.flow-celebration__panel {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 22rem;
    padding: 1.5rem 1.35rem 1.35rem;
    background: var(--app-surface);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    box-shadow: 0 20px 56px rgba(0, 51, 89, 0.2);
    text-align: center;
    transform: scale(0.92) translateY(12px);
    opacity: 0;
    transition:
        transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.4s ease;
}

html[data-theme="dark"] .flow-celebration__panel {
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
}

.flow-celebration.is-visible .flow-celebration__panel {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.flow-celebration.is-visible.is-saved .flow-celebration__backdrop {
    transition: opacity 0.14s ease;
}

.flow-celebration.is-visible.is-saved .flow-celebration__panel {
    transition:
        transform 0.22s cubic-bezier(0.34, 1.15, 0.64, 1),
        opacity 0.14s ease;
}

.flow-celebration__burst {
    position: absolute;
    left: 50%;
    top: 2.1rem;
    width: 8rem;
    height: 8rem;
    margin-left: -4rem;
    margin-top: -4rem;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        color-mix(in srgb, var(--tum-bright) 42%, transparent) 0%,
        transparent 70%
    );
    opacity: 0;
    transform: scale(0.5);
    transition:
        opacity 0.5s ease,
        transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
}

.flow-celebration.is-converted .flow-celebration__burst {
    opacity: 1;
    transform: scale(1);
}

.flow-celebration.is-saved .flow-celebration__burst {
    opacity: 0;
    visibility: hidden;
    transform: scale(0.5);
    transition: none;
}

.flow-celebration.is-saved .flow-celebration__check-ring {
    opacity: 0;
}

.flow-celebration.is-saved .flow-celebration__check-mark {
    stroke-dashoffset: 40;
    transition: stroke-dashoffset 0.58s cubic-bezier(0.22, 1, 0.36, 1) 0.08s;
}

.flow-celebration.is-saved .flow-celebration__check-mark.is-drawn {
    stroke-dashoffset: 0;
}

.flow-celebration__icon {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 0.65rem;
    width: 3.5rem;
    height: 3.5rem;
    color: var(--tum-bright-web);
}

.flow-celebration__check {
    width: 100%;
    height: 100%;
}

.flow-celebration__check-ring {
    opacity: 0.35;
}

.flow-celebration__check-mark {
    stroke-dasharray: 40;
    stroke-dashoffset: 40;
    transition: stroke-dashoffset 0.55s cubic-bezier(0.22, 1, 0.36, 1) 0.12s;
}

.flow-celebration.is-converted .flow-celebration__check-mark {
    stroke-dashoffset: 0;
}

.flow-celebration__title {
    font-family: Sora, var(--font-ui);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 0.35rem;
    color: var(--color-text);
    letter-spacing: -0.03em;
}

.flow-celebration__sub {
    margin: 0 0 1rem;
    font-size: 0.86rem;
    line-height: 1.45;
    color: var(--tum-text-muted);
}

.flow-celebration__bar {
    height: 5px;
    border-radius: 999px;
    background: var(--app-muted);
    overflow: hidden;
}

.flow-celebration__bar-fill {
    height: 100%;
    width: 0%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--tum-bright), color-mix(in srgb, var(--tum-bright-web) 70%, #fff));
    transition: width 0.05s linear;
}

.flow-celebration.is-converted .flow-celebration__bar-fill {
    width: 100%;
    transition: width 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.flow-celebration.is-uploading .flow-celebration__bar-fill {
    width: 92%;
    animation: flowCelebrationBarPulse 1.1s ease-in-out infinite;
}

.flow-celebration.is-saved .flow-celebration__bar-fill {
    width: 100%;
    animation: none;
}

.flow-celebration.is-error .flow-celebration__bar-fill {
    width: 100%;
    background: linear-gradient(90deg, #c62828, #e57373);
    animation: none;
}

.flow-celebration.is-guest .flow-celebration__bar-fill {
    width: 100%;
    animation: none;
}

@keyframes flowCelebrationBarPulse {
    0%,
    100% {
        opacity: 1;
    }
    50% {
        opacity: 0.55;
    }
}

@media (prefers-reduced-motion: reduce) {
    .flow-celebration__panel,
    .flow-celebration__backdrop,
    .flow-celebration__burst,
    .flow-celebration__check-mark,
    .flow-celebration__bar-fill {
        transition: none !important;
        animation: none !important;
    }

    .flow-celebration.is-visible .flow-celebration__panel {
        transform: none;
        opacity: 1;
    }

    .flow-celebration.is-converted .flow-celebration__check-mark {
        stroke-dashoffset: 0;
    }

    .flow-celebration.is-saved .flow-celebration__check-mark.is-drawn {
        stroke-dashoffset: 0;
    }

    .robot-carousel__track,
    .robot-carousel__cell-inner {
        transition: none !important;
    }

    .robot-carousel__chev:active {
        transform: none;
    }
}

#flowStep1 .file-list {
    border-radius: clamp(10px, 1.2vw, 14px);
    margin-top: 0.65rem;
}

#flowStep1 .file-list[hidden] {
    display: none !important;
}

/* Result & output card */
.result-section.app-card {
    margin-bottom: 0;
    border: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
    background: linear-gradient(
        165deg,
        color-mix(in srgb, var(--app-surface) 96%, rgba(0, 101, 189, 0.05)),
        var(--color-bg)
    );
    border-radius: clamp(16px, 2vw, 22px);
    box-shadow: 0 10px 34px rgba(0, 51, 89, 0.07);
    overflow: hidden;
}

html[data-theme="dark"] .result-section.app-card {
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}

.error-section.app-card {
    border-radius: clamp(16px, 2vw, 22px);
    overflow: hidden;
    border-color: color-mix(in srgb, #c62828 35%, var(--tum-border));
    box-shadow: 0 10px 28px rgba(198, 40, 40, 0.08);
}

.result-header {
    background: transparent;
    border-bottom: 1px solid var(--color-border);
    padding: 0.875rem 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
}

.result-header__title {
    flex: 1;
    min-width: 0;
}

.result-header__back {
    flex-shrink: 0;
}

.result-header__title h2 {
    font-family: var(--font-ui);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0;
    color: var(--color-text);
    margin: 0;
}

@media (max-width: 640px) {
    .result-header {
        flex-wrap: wrap;
        align-items: flex-start;
    }

    .result-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .save-filename-input {
        flex: 1;
        min-width: 0;
    }

    .result-info-wrap {
        flex-direction: column;
    }

    .result-trajectory-controls {
        width: 100%;
        margin-top: 0;
    }
}

.result-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
    margin-left: auto;
}

.save-filename-label {
    font-size: 0.625rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
}

.save-filename-input {
    width: 10rem;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--tum-border);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    border-radius: var(--radius-control);
    background: var(--app-input-bg);
    color: var(--tum-text);
}

html[data-theme="dark"] .save-filename-label {
    color: var(--color-text-secondary);
}

html[data-theme="dark"] .save-filename-input {
    background: color-mix(in srgb, var(--app-input-bg) 88%, #0b1f2a);
    border-color: color-mix(in srgb, var(--color-border) 86%, #4da3ff);
    color: var(--color-text);
}

html[data-theme="dark"] .save-filename-input::placeholder {
    color: var(--color-text-secondary);
}

.save-filename-input:focus {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
    border-color: var(--tum-bright-web);
}

.btn-save {
    background: var(--tum-navy);
    color: var(--tum-white);
    border: 1px solid var(--tum-navy);
    padding: 0.45rem 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    font-family: var(--font-ui);
    cursor: pointer;
    border-radius: var(--radius-control);
    transition: background 0.15s ease, border-color 0.15s ease;
}

.btn-save:hover {
    background: var(--tum-blue-hover);
}

html[data-theme="dark"] .btn-save {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

html[data-theme="dark"] .btn-save:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.btn-save:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

/* Conversion output — blue when successful */
.result-info {
    display: block;
    margin: 0;
    padding: 0;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--color-text);
}

.result-info-wrap {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin: 1rem 1rem 0;
    padding: 0.875rem 1rem;
    border-radius: var(--radius-control);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
}

.result-info-wrap .result-info {
    flex: 1;
}

.result-trajectory-controls {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-top: 4.6rem;
}

.result-trajectory-controls .flow-select {
    min-width: 14rem;
}

html[data-theme="dark"] .result-info {
    color: var(--color-text);
}

.robot-models-hint {
    margin: 0.35rem 0 0;
    font-size: 0.75rem;
    line-height: 1.45;
    color: var(--tum-text-muted);
}

.robot-model-preview {
    margin: 0 0 0.8rem;
    border: 1px solid var(--tum-border);
    background: var(--app-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 10rem;
    overflow: hidden;
}

.robot-model-preview__img {
    width: 100%;
    max-height: 14rem;
    object-fit: contain;
    display: block;
}

.robot-models-hint--error {
    color: #b3261e;
}

html[data-theme="dark"] .robot-models-hint--error {
    color: #f2b8b5;
}

html[data-theme="dark"] .app-code {
    background: rgba(0, 101, 189, 0.18);
}

.btn-view-metadata {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    min-width: 0;
    background: transparent;
    color: var(--tum-text);
    border: 1px solid var(--tum-border);
    padding: 0.45rem 0.85rem;
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: var(--font-ui);
    cursor: pointer;
    margin: 0;
    border-radius: var(--radius-control);
    transition: background 0.15s ease, border-color 0.15s ease;
}

.btn-view-metadata:hover {
    background: var(--app-muted);
    border-color: rgba(0, 101, 189, 0.35);
}

.btn-view-metadata:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

html[data-theme="dark"] .btn-view-metadata:hover {
    background: rgba(0, 101, 189, 0.12);
}

/* Uploaded file metadata popup (double-click in drawer) */
.upload-details-modal {
    position: fixed;
    inset: 0;
    z-index: 10050;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
}

.upload-details-modal[hidden] {
    display: none !important;
}

.upload-details-modal__overlay {
    position: absolute;
    inset: 0;
    background: color-mix(in srgb, var(--tum-navy) 48%, rgba(0, 0, 0, 0.4));
}

.upload-details-modal__panel {
    position: relative;
    width: 100%;
    max-width: min(32rem, 100%);
    padding: 1.15rem 1.2rem 1.25rem;
    border-radius: 14px;
    border: 1px solid color-mix(in srgb, var(--tum-border) 80%, transparent);
    background: var(--app-surface);
    box-shadow: 0 18px 48px rgba(0, 51, 89, 0.2);
}

.upload-details-modal__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
}

.upload-details-modal__title {
    margin: 0;
    font-family: Sora, var(--font-ui);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text);
}

.upload-details-modal__subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--tum-text-muted);
    word-break: break-word;
}

.upload-details-modal__close {
    flex-shrink: 0;
    border: none;
    background: color-mix(in srgb, var(--tum-navy) 8%, transparent);
    color: var(--tum-text-muted);
    font-size: 1.35rem;
    line-height: 1;
    padding: 0.25rem 0.55rem;
    border-radius: var(--radius-control);
    cursor: pointer;
}

.upload-details-modal__close:hover {
    background: color-mix(in srgb, var(--tum-bright-web) 14%, transparent);
    color: var(--tum-bright-web);
}

.upload-details-modal__close:focus-visible {
    outline: 2px solid var(--tum-bright-web);
    outline-offset: 2px;
}

.upload-details-modal__loading,
.upload-details-modal__error {
    margin: 0;
    font-size: 0.86rem;
    line-height: 1.45;
    color: var(--tum-text-muted);
}

.upload-details-modal__error {
    color: #b3261e;
}

html[data-theme="dark"] .upload-details-modal__error {
    color: #f2b8b5;
}

.upload-details-modal__list {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0;
}

.upload-details-modal__list dt {
    margin: 0.85rem 0 0;
}

.upload-details-modal__list dt:first-child {
    margin-top: 0;
}

.upload-details-modal__label {
    margin: 0;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
}

.upload-details-modal__value {
    margin: 0.2rem 0 0;
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.45;
    color: var(--color-text);
    word-break: break-word;
    overflow-wrap: anywhere;
    white-space: normal;
}

.upload-details-modal__value--mono {
    font-family: var(--font-mono);
    font-size: 0.86rem;
    font-weight: 500;
}

/* Auth modals (change password, etc.) */
.auth-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 35, 60, 0.45);
}

.auth-modal-content {
    position: relative;
    background: var(--app-surface);
    border: 1px solid rgba(0, 51, 89, 0.1);
    border-radius: var(--radius-card);
    width: 100%;
    max-width: 400px;
    padding: 26px 26px 28px;
}

.auth-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 22px;
}

.auth-modal-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--tum-intro-dark);
}

.auth-modal-close {
    background: rgba(0, 51, 89, 0.08);
    border: none;
    font-size: 22px;
    line-height: 1;
    color: var(--tum-text-muted);
    cursor: pointer;
    padding: 6px 10px;
    border-radius: var(--radius-control);
    transition: background 0.15s ease, color 0.15s ease;
}

.auth-modal-close:hover {
    background: rgba(0, 101, 189, 0.12);
    color: var(--tum-bright);
}

.auth-modal-content label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--tum-intro-dark);
    margin-bottom: 8px;
}

.auth-modal-content input {
    width: 100%;
    min-height: 46px;
    padding: 12px 14px;
    border: 1.5px solid var(--tum-border);
    border-radius: var(--radius-control);
    font-size: 15px;
    margin-bottom: 16px;
    font-family: inherit;
    background: var(--app-surface);
    color: var(--tum-text);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.auth-modal-content input:hover {
    border-color: rgba(0, 101, 189, 0.35);
    background: var(--app-surface);
}

.auth-modal-content input:focus {
    outline: 2px solid var(--tum-logo-blue);
    outline-offset: 2px;
    border-color: var(--tum-logo-blue);
    background: var(--app-surface);
}

.auth-modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 22px;
    flex-wrap: wrap;
}

.auth-modal-actions .btn-auth {
    width: auto;
    min-height: 44px;
    padding-left: 20px;
    padding-right: 20px;
}

.btn-cancel {
    background: var(--app-surface);
    color: var(--tum-text);
    border: 1.5px solid var(--tum-border);
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-control);
    transition: background 0.15s ease, border-color 0.15s ease;
}

.btn-cancel:hover {
    background: rgba(0, 101, 189, 0.06);
    border-color: rgba(0, 101, 189, 0.45);
}

/* Error section — conversion / API failures */
.error-header {
    background: var(--app-muted);
    border-bottom: 1px solid var(--tum-border);
    padding: 0.75rem 1rem;
}

.error-header h2 {
    font-family: var(--font-ui);
    font-size: 0.9375rem;
    font-weight: 600;
    color: #c62828;
    margin: 0;
}

.error-content {
    display: block;
    margin: 1rem 1rem 1rem;
    padding: 0.875rem 1rem;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
    border-radius: var(--radius-control);
    background: #ffebee;
    border: 1px solid #ffcdd2;
    color: #b71c1c;
}

html[data-theme="dark"] .error-header h2 {
    color: #ef9a9a;
}

html[data-theme="dark"] .error-content {
    background: rgba(183, 28, 28, 0.2);
    border-color: rgba(239, 83, 80, 0.45);
    color: #ffcdd2;
}

/* Footer — end of main app (always below content) */
.app-footer {
    width: 100%;
    flex-shrink: 0;
    margin-top: auto;
    padding: 1.25rem 1rem 1.5rem;
    text-align: center;
    border-top: 1px solid var(--tum-border);
    background: var(--app-muted);
}

.app-footer__inner {
    max-width: min(720px, 100%);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.app-footer__line {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--tum-text);
    line-height: 1.35;
}

.app-footer__line--sub {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--tum-text-muted);
    letter-spacing: 0.04em;
}

.status-bar {
    background: color-mix(in srgb, var(--app-surface) 88%, var(--app-muted));
    border: 1px solid color-mix(in srgb, var(--tum-border) 80%, transparent);
    border-radius: 999px;
    padding: 0.65rem 1.15rem;
    margin-bottom: 0;
    font-size: 0.78rem;
    color: var(--tum-text-muted);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.6rem 1rem;
    box-shadow: 0 6px 20px rgba(0, 51, 89, 0.06);
}

.status-flow {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.2rem 0.45rem;
    flex: 1 1 auto;
    min-width: 0;
    color: var(--tum-text-muted);
    font-size: inherit;
}

.status-flow__seg {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    max-width: 100%;
}

.status-flow__text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: min(42vw, 15rem);
    color: var(--tum-text);
    font-weight: 500;
}

.status-flow__icon {
    width: 1.05em;
    height: 1.05em;
    flex-shrink: 0;
    opacity: 0.88;
}

.status-flow__sep {
    opacity: 0.42;
    user-select: none;
    font-weight: 500;
}

.status-bar #statusText {
    margin-left: auto;
}

@media (max-width: 560px) {
    .status-bar {
        border-radius: 14px;
        flex-wrap: wrap;
    }
}

.status-line {
    color: var(--tum-text-muted);
    font-weight: 400;
}

.status-line--error {
    color: #c62828;
    font-weight: 500;
}

.status-line--secondary {
    text-align: right;
    flex-shrink: 0;
    max-width: 55%;
}

.status-line--secondary.status-matlab-ok {
    color: var(--tum-text-muted);
}

.status-line--secondary.status-matlab-warn {
    color: #c62828;
}

html[data-theme="dark"] .status-line--error,
html[data-theme="dark"] .status-line--secondary.status-matlab-warn {
    color: #ef9a9a;
}

/* --- Intro splash: TUM MR Robotics --- */
body.intro-splash-active {
    overflow: hidden;
}

/* Auth screens should behave like fixed views (no page scroll). */
body:has(#authScreen:not([hidden])),
body:has(#verifyEmailScreen:not([hidden])) {
    overflow: hidden;
}

.intro-splash {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    isolation: isolate;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transition: opacity 1.25s cubic-bezier(0.22, 1, 0.36, 1), visibility 1.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.intro-splash.intro-splash--exit {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Flat overlay on splash (no grid / gradients) */
.intro-splash__bg {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: transparent;
    opacity: 0;
    mix-blend-mode: normal;
}

.intro-splash__inner {
    position: relative;
    z-index: 2;
    padding: 2rem;
    text-align: center;
}

.intro-splash__brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 0;
    min-height: 1.2em;
}

.intro-splash__tum {
    display: block;
    width: auto;
    height: clamp(5.6rem, 15vw, 8.8rem);
    object-fit: contain;
    z-index: 2;
    position: relative;
    opacity: 0;
    transform: translateY(22px) scale(0.98);
    transition:
        opacity 1.2s cubic-bezier(0.22, 1, 0.36, 1),
        transform 1.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.intro-splash__tum--light {
    height: clamp(4rem, 11vw, 6.3rem);
}

.intro-splash__tum--dark {
    display: none;
}

html[data-theme="dark"] .intro-splash__tum--light {
    display: none;
}

html[data-theme="dark"] .intro-splash__tum--dark {
    display: block;
}

.intro-splash--tum-in .intro-splash__tum {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.intro-splash__divider {
    flex-shrink: 0;
    align-self: center;
    width: 0;
    height: 0.72em;
    font-size: var(--intro-title-size);
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 1px;
    opacity: 0;
    background: var(--tum-bright-web);
    /* Short pop-in with TUM’s slide — not the slow MR “from behind” reveal */
    transition:
        width 0.38s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.32s ease,
        margin 0.38s cubic-bezier(0.22, 1, 0.36, 1);
}

.intro-splash--split .intro-splash__divider {
    width: 2px;
    opacity: 1;
    margin: 0 0.35em;
}

.intro-splash__mr-wrap {
    position: relative;
    z-index: 1;
    overflow: hidden;
    max-width: 0;
    opacity: 0;
    transition:
        max-width 2s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.85s ease 0.2s;
}

.intro-splash__mr {
    display: inline-block;
    font-family: var(--font-tum-ar);
    color: var(--tum-white);
    font-size: var(--intro-title-size);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1;
    white-space: nowrap;
    padding-left: 0.18em;
    transform: translateX(36px);
    transition: transform 2s cubic-bezier(0.22, 1, 0.36, 1);
}

.intro-splash--split .intro-splash__tum {
    transform: translateX(-14px) translateY(0) scale(1);
    transition:
        opacity 1.2s cubic-bezier(0.22, 1, 0.36, 1),
        transform 2s cubic-bezier(0.22, 1, 0.36, 1);
}

.intro-splash--split .intro-splash__mr-wrap {
    max-width: 22rem;
    opacity: 1;
}

.intro-splash--split .intro-splash__mr {
    transform: translateX(0);
}

@media (max-width: 480px) {
    .intro-splash--split .intro-splash__tum {
        transform: translateX(-8px) translateY(0) scale(1);
    }
    .intro-splash__mr {
        padding-left: 0.14em;
    }

    .intro-splash--split .intro-splash__divider {
        margin: 0 0.28em;
    }
}

/* ---- Modern wizard + action animations ---- */
.btn-files {
    margin-left: 0.35rem;
}

/* —— Uploaded files: slide-in drawer —— */
.uploads-drawer {
    position: fixed;
    inset: 0;
    z-index: 10030;
    pointer-events: none;
}

.uploads-drawer[hidden] {
    display: none !important;
}

.uploads-drawer:not([hidden]) {
    display: block;
}

.uploads-drawer__backdrop {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: auto;
    background: color-mix(in srgb, var(--tum-navy) 42%, rgba(0, 0, 0, 0.38));
    opacity: 0;
    transition: opacity 0.28s ease;
    backdrop-filter: blur(2px);
}

html[data-theme="dark"] .uploads-drawer__backdrop {
    background: color-mix(in srgb, #000 78%, rgba(0, 101, 189, 0.2));
}

.uploads-drawer--open .uploads-drawer__backdrop {
    opacity: 1;
}

.uploads-drawer__panel {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 1;
    width: min(440px, min(94vw, 100% - 1rem));
    max-width: 100%;
    display: flex;
    flex-direction: column;
    background: var(--app-surface);
    color: var(--color-text);
    border-left: 1px solid color-mix(in srgb, var(--tum-border) 85%, transparent);
    border-radius: 20px 0 0 20px;
    box-shadow:
        -12px 0 48px rgba(0, 51, 89, 0.14),
        0 0 0 1px color-mix(in srgb, var(--tum-border) 55%, transparent);
    transform: translateX(105%);
    transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: auto;
}

html[data-theme="dark"] .uploads-drawer__panel {
    box-shadow:
        -16px 0 56px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(0, 101, 189, 0.2);
}

.uploads-drawer--open .uploads-drawer__panel {
    transform: translateX(0);
}

.uploads-drawer__header {
    flex-shrink: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1rem 0.85rem 1.15rem;
    border-bottom: 1px solid color-mix(in srgb, var(--tum-border) 70%, transparent);
    background: linear-gradient(
        180deg,
        color-mix(in srgb, var(--app-surface) 88%, var(--tum-bright)) 0%,
        var(--app-surface) 100%
    );
}

.uploads-drawer__header-text {
    min-width: 0;
    flex: 1 1 auto;
}

.uploads-drawer__title {
    margin: 0 0 0.2rem;
    font-family: Sora, var(--font-ui);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text);
    line-height: 1.2;
}

.uploads-drawer__subtitle {
    margin: 0;
    font-family: var(--font-ui);
    font-size: 0.78rem;
    line-height: 1.45;
    color: var(--tum-text-muted);
    font-weight: 500;
}

.uploads-drawer__actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.uploads-drawer__sort-field {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.uploads-drawer__sort-label {
    font-family: var(--font-ui);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--tum-text-muted);
}

.uploads-drawer__sort {
    font-family: var(--font-ui);
    font-size: 0.78rem;
    padding: 0.38rem 0.55rem;
    border-radius: 10px;
    border: 1px solid var(--tum-border);
    background: var(--app-input-bg, var(--app-surface));
    color: var(--tum-text);
    cursor: pointer;
    min-height: 2.15rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.uploads-drawer__sort:hover {
    border-color: color-mix(in srgb, var(--tum-bright) 45%, var(--tum-border));
}

.uploads-drawer__sort:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--tum-bright) 65%, transparent);
    outline-offset: 2px;
}

.uploads-drawer__icon-btn {
    flex-shrink: 0;
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    border: 1px solid transparent;
    border-radius: 12px;
    background: color-mix(in srgb, var(--app-muted) 55%, var(--app-surface));
    color: var(--tum-text-muted);
    cursor: pointer;
    transition:
        background 0.15s ease,
        color 0.15s ease,
        border-color 0.15s ease,
        transform 0.12s ease;
}

.uploads-drawer__icon-btn:hover {
    background: color-mix(in srgb, var(--tum-bright) 14%, var(--app-muted));
    color: var(--tum-bright);
    border-color: color-mix(in srgb, var(--tum-bright) 28%, var(--tum-border));
}

.uploads-drawer__icon-btn:active {
    transform: scale(0.96);
}

.uploads-drawer__icon-btn:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--tum-bright) 55%, transparent);
    outline-offset: 2px;
}

.uploads-drawer__icon-btn--close:hover {
    color: var(--color-text);
}

.uploads-drawer__icon {
    width: 1.15rem;
    height: 1.15rem;
}

.uploads-drawer__body {
    flex: 1;
    min-height: 0;
    overflow: auto;
    padding: 0.85rem 1rem 1.15rem 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    background: linear-gradient(
        180deg,
        color-mix(in srgb, var(--app-muted) 28%, var(--app-surface)) 0%,
        color-mix(in srgb, var(--app-muted) 42%, var(--app-surface)) 100%
    );
}

.uploads-placeholder {
    flex: 1;
    min-height: 8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.uploads-feedback {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    padding: 1.25rem 1rem;
    text-align: center;
    font-family: var(--font-ui);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--tum-text-muted);
    max-width: 22rem;
}

.uploads-feedback--error {
    color: color-mix(in srgb, #c62828 88%, var(--tum-text));
    font-weight: 600;
}

html[data-theme="dark"] .uploads-feedback--error {
    color: color-mix(in srgb, #ff8a80 92%, var(--tum-text));
}

.uploads-feedback__label {
    text-align: left;
}

.uploads-feedback__spinner {
    width: 1.35rem;
    height: 1.35rem;
    flex-shrink: 0;
    border-radius: 50%;
    border: 2px solid color-mix(in srgb, var(--tum-border) 80%, transparent);
    border-top-color: var(--tum-bright);
    animation: uploads-spin 0.7s linear infinite;
}

@keyframes uploads-spin {
    to {
        transform: rotate(360deg);
    }
}

.uploads-idle {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1.25rem 0.75rem 1.5rem;
    max-width: 18.5rem;
}

.uploads-idle__icon {
    width: 3.5rem;
    height: 3.5rem;
    margin-bottom: 0.65rem;
    color: color-mix(in srgb, var(--tum-bright) 55%, var(--tum-text-muted));
}

.uploads-idle__icon svg {
    width: 100%;
    height: 100%;
    display: block;
}

.uploads-idle__title {
    margin: 0 0 0.35rem;
    font-family: Sora, var(--font-ui);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.uploads-idle__text {
    margin: 0;
    font-family: var(--font-ui);
    font-size: 0.8125rem;
    line-height: 1.55;
    color: var(--tum-text-muted);
}

.uploads-idle__text strong {
    color: var(--color-text);
    font-weight: 600;
}

.uploads-drawer__list-wrap {
    flex: 1;
    min-height: 0;
}

.uploads-drawer__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.upload-file-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.65rem 0.75rem;
    padding: 0.72rem 0.85rem 0.72rem 0.72rem;
    margin: 0;
    border: 1px solid color-mix(in srgb, var(--tum-border) 82%, transparent);
    border-radius: 14px;
    background: var(--app-surface);
    font-family: var(--font-ui);
    font-size: 0.8125rem;
    cursor: pointer;
    box-shadow: 0 1px 0 color-mix(in srgb, var(--tum-border) 35%, transparent);
    transition:
        border-color 0.18s ease,
        box-shadow 0.15s ease,
        transform 0.15s ease;
}

.upload-file-row:hover {
    border-color: color-mix(in srgb, var(--tum-bright) 38%, var(--tum-border));
    box-shadow:
        0 6px 20px rgba(0, 101, 189, 0.1),
        0 1px 0 color-mix(in srgb, var(--tum-bright) 22%, transparent);
    transform: translateY(-1px);
}

html[data-theme="dark"] .upload-file-row:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.upload-file-row__icon {
    display: grid;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 12px;
    background: color-mix(in srgb, var(--tum-bright) 12%, var(--app-muted));
    color: var(--tum-bright);
}

.upload-file-row__svg {
    width: 1.35rem;
    height: 1.35rem;
    display: block;
}

.upload-file-row__main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.upload-file-row__name {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text);
    word-break: break-word;
    line-height: 1.3;
}

.upload-file-row__meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.72rem;
    color: var(--tum-text-muted);
}

.upload-file-row__date {
    font-variant-numeric: tabular-nums;
}

.upload-file-row__sep {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--tum-text-muted) 55%, transparent);
    flex-shrink: 0;
}

.upload-file-row__size {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: color-mix(in srgb, var(--tum-text-muted) 70%, var(--color-text));
}

.upload-file-row__actions {
    display: flex;
    align-items: center;
    align-self: start;
    margin-top: 0.1rem;
}

.upload-file-row__delete {
    display: grid;
    place-items: center;
    width: 2.35rem;
    height: 2.35rem;
    padding: 0;
    border: none;
    border-radius: 11px;
    background: transparent;
    color: var(--tum-text-muted);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.upload-file-row__delete:hover {
    background: color-mix(in srgb, #c62828 12%, var(--app-muted));
    color: #b71c1c;
}

html[data-theme="dark"] .upload-file-row__delete:hover {
    background: color-mix(in srgb, #ff8a80 14%, var(--app-muted));
    color: #ffab91;
}

.upload-file-row__delete:focus-visible {
    outline: 2px solid color-mix(in srgb, var(--tum-bright) 55%, transparent);
    outline-offset: 2px;
}

.upload-file-row__delete .icon-trash {
    width: 1.15rem;
    height: 1.15rem;
    display: block;
}

@media (prefers-reduced-motion: reduce) {
    .uploads-drawer__backdrop,
    .uploads-drawer__panel {
        transition: none;
    }

    .upload-file-row {
        transition: none;
    }

    .upload-file-row:hover {
        transform: none;
    }

    .uploads-feedback__spinner {
        animation: none;
        border-top-color: var(--tum-border);
    }
}