/* ============================================
   Studio theme: the dark ES Designs pages
   (home, Thrustline, VR, About, Privacy), plus the site chrome
   that every page shares.

   Palette and type come from the Thrustline UI kit (ThrustlineTheme.cs,
   Design/Thrustline/Kit/K01-Tokens.png in the game repo), so the site and
   the game read as one studio. Loaded LAST.

   - Shared chrome (header, footer, contact button, music player): dark on
     every page, including the light education pages, so the whole site
     reads as one studio. Selectors use body[data-section] to match the
     section-scoped rules in education.css / brand-overrides.css.
   - Studio content: scoped to body[data-section="studio"].
   - Education pages (ed, shared): light content, Saira headings.

   Contrast on Night #0B1026: Hull 17.6:1, Muted 10.4:1, Dim 5.5:1,
   Thrust orange 8.1:1, Glide cyan 10.3:1 (all AA or better).
   ============================================ */

:root {
    --tl-night:   #0B1026;
    --tl-panel:   #0E1433;
    --tl-card:    #111838;
    --tl-raised:  #141B40;
    --tl-track:   #1E2758;
    --tl-border:  #24306A;
    --tl-line:    #2A3566;
    --tl-hull:    #EEF0F4;
    --tl-muted:   #B7C0DA;
    --tl-dim:     #7F8AB0;
    --tl-orange:  #FF8C1A;
    --tl-orange-hover: #FFA040;
    --tl-cyan:    #59CCFF;
    --tl-gold:    #F2C14E;
    --tl-green:   #7CE08A;
    --tl-blue:    #246BEB;
}

/* The education pages keep their light content, in the studio's type */
body[data-section="ed"],
body[data-section="shared"] {
    --font-display: 'Saira', 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body[data-section="studio"] {
    --tl-night:   #0B1026;
    --tl-panel:   #0E1433;
    --tl-card:    #111838;
    --tl-raised:  #141B40;
    --tl-track:   #1E2758;
    --tl-border:  #24306A;
    --tl-line:    #2A3566;
    --tl-hull:    #EEF0F4;
    --tl-muted:   #B7C0DA;
    --tl-dim:     #7F8AB0;
    --tl-orange:  #FF8C1A;
    --tl-orange-hover: #FFA040;
    --tl-cyan:    #59CCFF;
    --tl-gold:    #F2C14E;
    --tl-green:   #7CE08A;
    --tl-blue:    #246BEB;

    /* Legacy tokens the base CSS reads, mapped onto the studio palette */
    --bg-primary:     var(--tl-night);
    --bg-secondary:   var(--tl-panel);
    --bg-card:        var(--tl-card);
    --bg-card-hover:  var(--tl-raised);
    --bg-overlay:     rgba(11, 16, 38, 0.94);
    --neon-cyan:      var(--tl-cyan);
    --neon-magenta:   var(--tl-orange);
    --neon-orange:    var(--tl-orange);
    --neon-purple:    var(--tl-cyan);
    --neon-green:     var(--tl-green);
    --glow-cyan:      rgba(89, 204, 255, 0.16);
    --glow-magenta:   rgba(255, 140, 26, 0.16);
    --glow-orange:    rgba(255, 140, 26, 0.16);
    --glow-purple:    rgba(89, 204, 255, 0.16);
    --text-primary:   var(--tl-hull);
    --text-secondary: var(--tl-muted);
    --text-muted:     var(--tl-dim);
    --color-accent:   var(--tl-cyan);
    --gradient-neon:  linear-gradient(90deg, var(--tl-orange), var(--tl-cyan));
    --border-glow:    1px solid var(--tl-border);

    --font-display: 'Saira', 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body:    'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --st-gutter: 24px;
    --st-max: 1160px;
}

html body[data-section="studio"] {
    background: var(--tl-night);
    color: var(--tl-hull);
    font-weight: 400;
}

body[data-section="studio"] #particle-canvas { display: none; }

body[data-section="studio"] :focus-visible {
    outline: 3px solid var(--tl-cyan);
    outline-offset: 3px;
}

body[data-section="studio"] .skip-link:focus {
    background: var(--tl-orange);
    color: var(--tl-night);
}

body[data-section="studio"] section::before,
body[data-section="studio"] section::after { display: none; }

/* ---------- Header (every page) ---------- */
body[data-section] .site-header {
    background: var(--tl-night);
    border-bottom: 1px solid var(--tl-border);
    backdrop-filter: saturate(160%) blur(10px);
    -webkit-backdrop-filter: saturate(160%) blur(10px);
}
body[data-section] .site-header.scrolled {
    background: var(--tl-night);
    border-bottom-color: var(--tl-line);
}
body[data-section] a.nav-brand,
body[data-section] a.nav-brand:link,
body[data-section] a.nav-brand:visited,
body[data-section] a.nav-brand:hover {
    -webkit-text-fill-color: var(--tl-hull);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.01em;
    color: var(--tl-hull);
    text-shadow: none;
}
body[data-section] .nav-brand::after {
    content: '';
    display: inline-block;
    width: 7px;
    height: 7px;
    margin-left: 6px;
    border-radius: 2px;
    background: var(--tl-orange);
    transform: skewX(-12deg);
}
body[data-section] .nav-link {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
    color: var(--tl-muted);
    text-shadow: none;
}
body[data-section] .nav-link:hover,
body[data-section] .nav-link.active {
    color: var(--tl-hull);
    text-shadow: none;
    background: transparent;
}
body[data-section] .nav-link::after {
    background: var(--tl-orange);
    box-shadow: none;
}
body[data-section] .hamburger span {
    background: var(--tl-hull);
    box-shadow: none;
}
@media (max-width: 1023px) {
    body[data-section] .nav-links {
        background: var(--tl-panel);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border-bottom: 1px solid var(--tl-border);
    }
    body[data-section] .nav-links .nav-link {
        color: var(--tl-muted);
        text-shadow: none;
        border-left-color: transparent;
        border-top: 1px solid var(--tl-line);
    }
    body[data-section] .nav-links .nav-link:first-child { border-top: none; }
    body[data-section] .nav-links .nav-link:hover,
    body[data-section] .nav-links .nav-link.active {
        color: var(--tl-hull);
        border-left-color: var(--tl-orange);
        background: rgba(255, 140, 26, 0.06);
    }
}

/* ---------- Footer ---------- */
body[data-section] .site-footer {
    background: var(--tl-panel);
    border-top: 1px solid var(--tl-border);
    color: var(--tl-dim);
}
body[data-section] .footer-links a {
    color: var(--tl-muted);
    text-shadow: none;
}
body[data-section] .footer-links a:hover { color: var(--tl-hull); }
body[data-section] .footer-copy { color: var(--tl-dim); }
body[data-section] .footer-logo-glow { display: none; }

/* ---------- Contact widget + back to top ---------- */
body[data-section] .contact-fab {
    background: var(--tl-card);
    border: 1.5px solid var(--tl-orange);
    color: var(--tl-orange);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
}
body[data-section] .contact-fab:hover {
    background: var(--tl-raised);
    box-shadow: 0 6px 22px rgba(0, 0, 0, 0.45);
}
body[data-section] .contact-panel {
    background: var(--tl-panel);
    border: 1px solid var(--tl-border);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}
body[data-section] .contact-panel-header { border-bottom-color: var(--tl-line); }
body[data-section] .contact-panel-title {
    font-family: var(--font-display);
    color: var(--tl-hull);
    text-shadow: none;
    letter-spacing: 0.02em;
}
body[data-section] .contact-panel-close { color: var(--tl-muted); }
body[data-section] .contact-panel-close:hover { color: var(--tl-hull); background: var(--tl-raised); }
body[data-section] .contact-action-btn {
    background: var(--tl-card);
    border-color: var(--tl-line);
    color: var(--tl-hull);
}
body[data-section] .contact-action-btn:hover {
    border-color: var(--tl-cyan);
    color: var(--tl-hull);
    background: var(--tl-raised);
}
body[data-section] .contact-action-btn svg,
body[data-section] .contact-action-btn:hover svg { color: var(--tl-cyan); filter: none; }
body[data-section] .contact-divider { background: var(--tl-line); }
body[data-section] .contact-form-field input,
body[data-section] .contact-form-field textarea {
    background: var(--tl-night);
    border: 1px solid var(--tl-line);
    color: var(--tl-hull);
}
body[data-section] .contact-form-field input::placeholder,
body[data-section] .contact-form-field textarea::placeholder { color: var(--tl-dim); }
body[data-section] .contact-form-field input:focus,
body[data-section] .contact-form-field textarea:focus {
    border-color: var(--tl-cyan);
    box-shadow: none;
}
body[data-section] .back-to-top {
    background: var(--tl-card);
    border: 1px solid var(--tl-line);
    color: var(--tl-hull);
    box-shadow: none;
}

/* Brand + section label ("ES Designs  For Educators") */
.nav-brand-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}
.nav-section {
    padding: 4px 10px;
    border: 1px solid var(--tl-line);
    border-radius: 999px;
    color: var(--tl-muted);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.nav-section[hidden] { display: none; }
a.nav-section { text-decoration: none; }
a.nav-section:hover { color: var(--tl-hull); border-color: var(--tl-cyan); }
body[data-section] .footer-logo { filter: none; }
.footer-wordmark {
    display: inline-flex;
    align-items: center;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--tl-hull);
    white-space: nowrap;
}
.footer-wordmark::after {
    content: '';
    width: 7px;
    height: 7px;
    margin-left: 6px;
    border-radius: 2px;
    background: var(--tl-orange);
    transform: skewX(-12deg);
}
body[data-section] .contact-action-btn { color: var(--tl-hull); }

/* ---------- Music: the button and the player (every page) ---------- */
.music-fab {
    position: fixed;
    left: calc(var(--space-lg) + 60px);
    bottom: 16px;
    z-index: calc(var(--z-music-player) - 1);
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--tl-card);
    border: 1.5px solid var(--tl-cyan);
    color: var(--tl-cyan);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
    cursor: pointer;
    transition: background 150ms ease, transform 150ms ease;
}
.music-fab:hover { background: var(--tl-raised); transform: scale(1.06); }
.music-fab:focus-visible { outline: 3px solid var(--tl-orange); outline-offset: 3px; }
body.music-playing .music-fab { border-color: var(--tl-orange); color: var(--tl-orange); }
body.music-playing .music-fab svg { animation: musicPulse 1.6s ease-in-out infinite; }
@keyframes musicPulse { 50% { transform: scale(1.12); } }

body.music-open .music-player { display: block; }
body.music-open .contact-widget,
body.music-open .music-fab,
body.music-open .back-to-top { bottom: calc(var(--player-height) + 16px); }

.music-player {
    background: rgba(11, 16, 38, 0.97);
    border-top: 1px solid var(--tl-border);
}
.music-player::before {
    background: linear-gradient(90deg, var(--tl-orange), var(--tl-cyan));
    animation: none;
    box-shadow: none;
}
.music-player::after { display: none; }
.music-player .player-progress { background: rgba(255, 255, 255, 0.08); }
.music-player .player-progress-fill {
    background: linear-gradient(90deg, var(--tl-orange), var(--tl-cyan));
    box-shadow: none;
}
.music-player .player-btn { color: var(--tl-muted); }
.music-player .player-btn:hover { color: var(--tl-hull); }
.music-player .player-btn-main { border-color: var(--tl-orange); color: var(--tl-orange); }
.music-player .player-btn-main:hover { background: rgba(255, 140, 26, 0.12); box-shadow: none; }
.music-player .player-shuffle-btn.shuffle-active,
.music-player .player-shuffle-btn:hover { color: var(--tl-orange); }
.music-player .player-track-name {
    color: var(--tl-hull);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1rem;
}
.music-player .player-expanded { background: var(--tl-panel); }
.music-player.expanded .player-expanded { border-top-color: var(--tl-line); }
.music-player .volume-slider::-webkit-slider-thumb { background: var(--tl-cyan); box-shadow: none; }
.music-player .volume-slider::-moz-range-thumb { background: var(--tl-cyan); box-shadow: none; }
.music-player .tracklist-item {
    width: 100%;
    border: 0;
    background: transparent;
    color: var(--tl-muted);
    font: inherit;
    font-size: 0.92rem;
    text-align: left;
}
.music-player .tracklist-item:hover { background: rgba(89, 204, 255, 0.06); color: var(--tl-hull); }
.music-player .tracklist-item.active { color: var(--tl-cyan); background: rgba(89, 204, 255, 0.1); }
.music-player .tracklist-item .track-number { color: var(--tl-dim); }

/* ---------- Legacy components still used on studio pages ---------- */
body[data-section="studio"] .neon-btn {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    letter-spacing: 0.01em;
    text-transform: none;
    border: 1.5px solid var(--tl-line);
    color: var(--tl-hull);
    background: transparent;
    text-shadow: none;
    box-shadow: none;
}
body[data-section="studio"] .neon-btn::after { display: none; }
body[data-section="studio"] .neon-btn:hover {
    border-color: var(--tl-cyan);
    background: rgba(89, 204, 255, 0.08);
    box-shadow: none;
}
body[data-section="studio"] .neon-btn.btn-filled,
body[data-section="studio"] .contact-submit-btn {
    background: var(--tl-orange);
    border-color: var(--tl-orange);
    color: var(--tl-night);
}
body[data-section="studio"] .neon-btn.btn-filled:hover,
body[data-section="studio"] .contact-submit-btn:hover {
    background: var(--tl-orange-hover);
    border-color: var(--tl-orange-hover);
}
body[data-section="studio"] .neon-card {
    background: var(--tl-card);
    border: 1px solid var(--tl-border);
    box-shadow: none;
}
body[data-section="studio"] .neon-card:hover {
    border-color: var(--tl-border);
    box-shadow: none;
    transform: none;
}
body[data-section="studio"] .neon-text {
    color: var(--tl-hull);
    text-shadow: none;
}
body[data-section="studio"] h1,
body[data-section="studio"] h2 {
    text-transform: none;
    letter-spacing: -0.005em;
    color: var(--tl-hull);
}
body[data-section="studio"] .label { color: var(--tl-cyan); }

/* Privacy page */
body[data-section="studio"] .privacy-section h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--tl-hull);
}
body[data-section="studio"] .privacy-section p,
body[data-section="studio"] .privacy-section li { color: var(--tl-muted); }
body[data-section="studio"] .privacy-section strong { color: var(--tl-hull); }
body[data-section="studio"] .privacy-app-name {
    color: var(--tl-cyan);
    text-shadow: none;
}
body[data-section="studio"] .privacy-highlight {
    color: var(--tl-hull);
    text-shadow: none;
    font-weight: 600;
}
body[data-section="studio"] .privacy-section ul li::before {
    background: var(--tl-orange);
    box-shadow: none;
}
body[data-section="studio"] .privacy-section a { color: var(--tl-cyan); }

/* ============================================
   Studio components (st-*)
   ============================================ */

/* main#page-content already offsets the fixed header */
.st-page {
    overflow-x: clip;
}
.st-container {
    width: 100%;
    max-width: var(--st-max);
    margin: 0 auto;
    padding: 0 var(--st-gutter);
}
.st-section { padding: 88px 0; }
.st-section-tight { padding: 56px 0; }
.st-section + .st-section { padding-top: 0; }

.st-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 18px;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--tl-cyan);
}
.st-eyebrow::before {
    content: '';
    width: 22px;
    height: 3px;
    border-radius: 2px;
    background: var(--tl-orange);
    transform: skewX(-20deg);
}
.st-eyebrow-plain::before { display: none; }

body[data-section="studio"] .st-h1,
body[data-section="studio"] .st-h2,
body[data-section="studio"] .st-h3 {
    font-family: var(--font-display);
    color: var(--tl-hull);
    text-transform: none;
    margin: 0;
}
body[data-section="studio"] .st-h1 {
    font-size: clamp(2.3rem, 5.2vw, 3.9rem);
    font-weight: 700;
    line-height: 1.04;
    letter-spacing: -0.015em;
}
body[data-section="studio"] .st-h2 {
    font-size: clamp(1.75rem, 3.4vw, 2.6rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.01em;
}
body[data-section="studio"] .st-h3 {
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0;
}
/* Thrustline's own voice: Saira Black Italic, wide, like the game UI */
body[data-section="studio"] .st-race {
    font-style: italic;
    font-weight: 900;
    font-stretch: 112%;
    letter-spacing: 0;
}
.st-lead {
    margin: 22px 0 0;
    max-width: 640px;
    font-size: 1.2rem;
    line-height: 1.65;
    color: var(--tl-muted);
}
.st-body {
    margin: 14px 0 0;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--tl-muted);
}
.st-body strong, .st-lead strong { color: var(--tl-hull); font-weight: 600; }
.st-body a, .st-lead a, .st-note a { color: var(--tl-cyan); text-decoration: underline; text-underline-offset: 3px; }
.st-note {
    margin: 12px 0 0;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--tl-dim);
}

.st-section-head { max-width: 720px; margin-bottom: 40px; }
.st-section-head-center { margin-left: auto; margin-right: auto; text-align: center; }
.st-section-head-center .st-eyebrow { justify-content: center; }

/* ---------- Buttons ---------- */
.st-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-top: 30px;
}
.st-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 12px 24px;
    border-radius: 10px;
    border: 1.5px solid var(--tl-line);
    background: transparent;
    color: var(--tl-hull);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}
.st-btn:hover { border-color: var(--tl-cyan); background: rgba(89, 204, 255, 0.08); color: var(--tl-hull); }
.st-btn-primary {
    background: var(--tl-orange);
    border-color: var(--tl-orange);
    color: var(--tl-night);
}
.st-btn-primary:hover {
    background: var(--tl-orange-hover);
    border-color: var(--tl-orange-hover);
    color: var(--tl-night);
    transform: translateY(-1px);
}
.st-btn[aria-disabled="true"] {
    color: var(--tl-dim);
    border-style: dashed;
    cursor: default;
}
.st-btn[aria-disabled="true"]:hover { border-color: var(--tl-line); background: transparent; }
.st-link {
    color: var(--tl-cyan);
    font-weight: 600;
    text-decoration: none;
}
.st-link:hover { text-decoration: underline; text-underline-offset: 3px; color: var(--tl-cyan); }

/* ---------- Home hero ---------- */
.st-hero { padding: 72px 0 40px; }
.st-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    align-items: center;
}
.st-hero-copy { max-width: 660px; }

/* ---------- Thrustline feature (home) ---------- */
.st-feature {
    border: 1px solid var(--tl-border);
    border-radius: 20px;
    background: var(--tl-panel);
    overflow: hidden;
}
/* Full 16:9 so the trailer's end card (title, URL) is never cropped. */
.st-feature-art {
    aspect-ratio: 16 / 9;
    background: var(--tl-night);
    border-bottom: 1px solid var(--tl-border);
}
.st-feature-body {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 48px;
    padding: 40px 44px 40px;
}
.st-feature-side .st-signup { margin-top: 0; }

.st-points {
    list-style: none;
    margin: 22px 0 0;
    padding: 0;
    display: grid;
    gap: 14px;
}
.st-points li {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    gap: 12px;
    align-items: start;
    color: var(--tl-muted);
    font-size: 1rem;
    line-height: 1.6;
}
.st-points li strong { color: var(--tl-hull); font-weight: 600; }
.st-points svg {
    width: 24px;
    height: 24px;
    margin-top: 1px;
    color: var(--tl-cyan);
}

/* ---------- Signup ---------- */
.st-signup { margin-top: 28px; }
.st-signup-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--tl-hull);
}
.st-signup-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.st-signup-row input[type="email"] {
    flex: 1 1 220px;
    min-width: 0;
    min-height: 48px;
    padding: 0 16px;
    border-radius: 10px;
    border: 1.5px solid var(--tl-line);
    background: var(--tl-night);
    color: var(--tl-hull);
    font: inherit;
    font-size: 1rem;
}
.st-signup-row input[type="email"]::placeholder { color: var(--tl-dim); }
.st-signup-row input[type="email"]:focus { border-color: var(--tl-cyan); outline: none; }
.st-signup-row input[type="email"]:focus-visible { outline: 3px solid var(--tl-cyan); outline-offset: 2px; }
.st-signup .contact-status {
    display: block;
    min-height: 1.4em;
    margin-top: 10px;
    font-size: 0.95rem;
    color: var(--tl-green);
}
.st-signup .contact-status.error { color: #FF6A5C; }
.st-signup .turnstile-slot, .st-signup .cf-turnstile { margin-top: 12px; }

/* ---------- Cards ---------- */
.st-grid-2, .st-grid-3 {
    display: grid;
    gap: 22px;
}
.st-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.st-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.st-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--tl-border);
    border-radius: 16px;
    background: var(--tl-card);
    overflow: hidden;
    color: inherit;
    text-decoration: none;
    transition: border-color 150ms ease, transform 150ms ease;
}
a.st-card:hover { border-color: var(--tl-cyan); transform: translateY(-2px); color: inherit; }
.st-card-img {
    aspect-ratio: 16 / 9;
    background: var(--tl-night);
    overflow: hidden;
}
.st-card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.st-card-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.st-card-body .st-body { font-size: 1rem; margin-top: 10px; }
.st-card-meta {
    margin: 0 0 10px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--tl-dim);
}
.st-card-meta.is-live { color: var(--tl-green); }
.st-card-meta.is-soon { color: var(--tl-orange); }
.st-card-cta {
    margin-top: auto;
    padding-top: 18px;
    color: var(--tl-cyan);
    font-weight: 600;
}

/* ---------- Pillars (how it's built) ---------- */
.st-pillar {
    padding: 28px;
    border: 1px solid var(--tl-border);
    border-radius: 16px;
    background: var(--tl-card);
}
.st-pillar-icon {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    margin-bottom: 18px;
    border-radius: 12px;
    background: var(--tl-raised);
    color: var(--tl-cyan);
}
.st-pillar-icon svg { width: 24px; height: 24px; }
.st-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}
.st-tags li {
    padding: 5px 11px;
    border-radius: 999px;
    border: 1px solid var(--tl-line);
    background: var(--tl-night);
    color: var(--tl-muted);
    font-size: 0.85rem;
    line-height: 1.3;
}

/* ---------- Quiet band (for educators) ---------- */
.st-band {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: 40px;
    align-items: start;
    padding: 36px;
    border: 1px solid var(--tl-line);
    border-radius: 18px;
    background: var(--tl-panel);
}
.st-band .st-h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
.st-linklist {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 2px;
}
.st-linklist a {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px;
    align-items: baseline;
    padding: 14px 4px;
    border-bottom: 1px solid var(--tl-line);
    color: var(--tl-hull);
    text-decoration: none;
}
.st-linklist li:last-child a { border-bottom: none; }
.st-linklist a span:first-child { font-weight: 600; }
.st-linklist a span:last-child { color: var(--tl-dim); font-size: 0.92rem; text-align: right; }
.st-linklist a:hover span:first-child { color: var(--tl-cyan); }

/* ---------- Thrustline page ---------- */
.tl-hero { padding: 40px 0 24px; }
.tl-hero-art {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--tl-border);
    background: var(--tl-night);
    aspect-ratio: 16 / 9;
}

/* ---------- Trailer (home feature, Thrustline hero) ----------
   The key art is the poster, since the trailer opens on it. A play button
   sits over it until pressed; then the browser's own controls take over
   (router.js bindPageEvents). */
.st-trailer { position: relative; }
.st-trailer video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: var(--tl-night);
}
.st-trailer-play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    padding: 24px;
    border: 0;
    background: transparent;
    cursor: pointer;
}
.st-trailer-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 12px 22px 12px 18px;
    border-radius: 999px;
    background: var(--tl-orange);
    color: var(--tl-night);
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.2;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
    transition: background 150ms ease, transform 150ms ease;
}
.st-trailer-pill svg { width: 20px; height: 20px; flex: none; }
.st-trailer-time { font-family: 'IBM Plex Mono', monospace; font-weight: 500; }
.st-trailer-play:hover .st-trailer-pill { background: var(--tl-orange-hover); transform: translateY(-1px); }
body[data-section="studio"] .st-trailer-play:focus-visible { outline: none; }
.st-trailer-play:focus-visible .st-trailer-pill { outline: 3px solid var(--tl-cyan); outline-offset: 3px; }
.st-trailer.is-started .st-trailer-play { display: none; }

.tl-hero-copy {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    margin-top: 44px;
}
.tl-signup-card {
    padding: 28px;
    border: 1px solid var(--tl-border);
    border-radius: 16px;
    background: var(--tl-panel);
}
.tl-signup-card .st-signup { margin-top: 0; }

.tl-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    counter-reset: tlstep;
}
.tl-steps li {
    position: relative;
    padding: 28px;
    border: 1px solid var(--tl-border);
    border-radius: 16px;
    background: var(--tl-card);
    counter-increment: tlstep;
}
.tl-steps li::before {
    content: counter(tlstep, decimal-leading-zero);
    display: block;
    margin-bottom: 12px;
    font-family: 'Saira', sans-serif;
    font-style: italic;
    font-weight: 900;
    font-size: 1.6rem;
    color: var(--tl-orange);
}

.tl-machines {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.tl-machines li {
    padding: 22px 20px;
    border: 1px solid var(--tl-border);
    border-radius: 14px;
    background: var(--tl-card);
}
.tl-machines svg { width: 34px; height: 34px; color: var(--tl-cyan); margin-bottom: 12px; }
.tl-machines strong { display: block; color: var(--tl-hull); font-size: 1.05rem; }
.tl-machines span { display: block; margin-top: 4px; color: var(--tl-dim); font-size: 0.92rem; line-height: 1.5; }

.tl-courses {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}
.tl-course {
    border: 1px solid var(--tl-border);
    border-radius: 14px;
    overflow: hidden;
    background: var(--tl-card);
}
.tl-course img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1200 / 252;
    object-fit: cover;
}
.tl-course div { padding: 16px 20px 18px; }
.tl-course h3 {
    margin: 0;
    font-family: 'Saira', sans-serif;
    font-style: italic;
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: 0.01em;
    color: var(--tl-hull);
    text-transform: uppercase;
}
.tl-course p { margin: 6px 0 0; font-size: 0.95rem; line-height: 1.55; color: var(--tl-muted); }

.tl-rivals {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style: none;
    margin: 20px 0 0;
    padding: 0;
}
.tl-rivals li {
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--tl-line);
    background: var(--tl-night);
    font-family: 'Saira', sans-serif;
    font-style: italic;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--tl-hull);
}
.tl-rivals li:first-child { border-color: var(--tl-green); }
.tl-rivals li:last-child { border-color: var(--tl-gold); color: var(--tl-gold); }

.tl-tracks {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}
.tl-tracks li { display: flex; }
.tl-track {
    width: 100%;
    min-height: 58px;
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: center;
    column-gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--tl-border);
    border-radius: 12px;
    background: var(--tl-card);
    color: var(--tl-hull);
    font: inherit;
    text-align: left;
    cursor: pointer;
    transition: border-color 150ms ease, background 150ms ease;
}
.tl-track:hover { border-color: var(--tl-orange); background: var(--tl-raised); }
.tl-track svg {
    grid-row: span 2;
    width: 30px;
    height: 30px;
    padding: 7px;
    border-radius: 50%;
    background: var(--tl-raised);
    color: var(--tl-orange);
}
.tl-track strong { font-weight: 600; font-size: 0.98rem; }
.tl-track span { color: var(--tl-dim); font-size: 0.82rem; }

.st-faq { display: grid; gap: 12px; max-width: 860px; }
.st-faq details {
    border: 1px solid var(--tl-border);
    border-radius: 12px;
    background: var(--tl-card);
}
.st-faq summary {
    cursor: pointer;
    list-style: none;
    padding: 18px 52px 18px 20px;
    position: relative;
    font-weight: 600;
    color: var(--tl-hull);
    font-size: 1.05rem;
}
.st-faq summary::-webkit-details-marker { display: none; }
.st-faq summary::after {
    content: '+';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
    color: var(--tl-orange);
}
.st-faq details[open] summary::after { content: '\2013'; }
.st-faq details p { margin: 0; padding: 0 20px 20px; color: var(--tl-muted); line-height: 1.7; font-size: 1rem; }

.st-timeline {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}
.st-timeline li {
    padding: 24px;
    border-top: 3px solid var(--tl-line);
    background: var(--tl-card);
    border-radius: 0 0 14px 14px;
}
.st-timeline li:last-child { border-top-color: var(--tl-orange); }
.st-timeline .st-card-meta { margin-bottom: 6px; }

.st-split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
}
.st-split-media {
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--tl-border);
}
.st-split-media img { display: block; width: 100%; height: auto; }

.st-callout {
    padding: 28px 32px;
    border: 1px solid var(--tl-line);
    border-left: 4px solid var(--tl-orange);
    border-radius: 12px;
    background: var(--tl-panel);
}

/* About portrait */
.st-about-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
}
.st-portrait {
    border-radius: 18px;
    overflow: hidden;
    border: 1px solid var(--tl-border);
    background: var(--tl-card);
}
.st-portrait img { display: block; width: 100%; height: auto; }

/* ---------- For Educators hub (light, ed section) ---------- */
/* Links inside running text on the light pages: brand teal and underlined,
   so they are distinguishable without relying on colour (WCAG 1.4.1). */
body:is([data-section="ed"], [data-section="shared"]) #page-content :is(p, li, dd) a:not([class]) {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}
body:is([data-section="ed"], [data-section="shared"]) #page-content :is(p, li, dd) a:not([class]):hover {
    color: var(--color-accent-hover);
}
.ed-hub-banner {
    display: block;
    width: 100%;
    height: auto;
    margin: 0 0 var(--space-xl);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}
@media (min-width: 768px) {
    .ed-product-grid.ed-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .ed-product-grid.ed-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- Responsive ---------- */
@media (min-width: 1024px) {
    .st-hero { padding: 96px 0 48px; }
}
@media (max-width: 960px) {
    .st-feature-body { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 30px 26px 28px; }
    .tl-hero-copy, .st-split, .st-about-grid, .st-band { grid-template-columns: minmax(0, 1fr); gap: 28px; }
    .st-grid-3, .tl-steps, .st-timeline { grid-template-columns: minmax(0, 1fr); }
    .tl-tracks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .tl-machines { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
    body[data-section="studio"] { --st-gutter: 16px; }
    .st-section { padding: 64px 0; }
    .st-hero { padding: 48px 0 28px; }
    .st-grid-2, .tl-courses, .tl-tracks { grid-template-columns: minmax(0, 1fr); }
    .nav-section { display: none; }
    .st-band { padding: 26px 20px; }
    .st-linklist a { grid-template-columns: minmax(0, 1fr); gap: 2px; }
    .st-linklist a span:last-child { text-align: left; }
    .tl-hero-art { border-radius: 14px; }
    .st-trailer-play { padding: 14px; }
    .st-trailer-pill { min-height: 44px; padding: 10px 18px 10px 14px; font-size: 0.95rem; }
    .st-signup-row .st-btn { flex: 1 1 100%; }
}
@media (max-width: 420px) {
    .tl-machines { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
    .st-btn, .st-card, .st-trailer-pill { transition: none; }
    .st-btn-primary:hover, a.st-card:hover, .st-trailer-play:hover .st-trailer-pill { transform: none; }
}