/* =========================================================================
   TRACK-O-TRON — instrument panel stylesheet
   A sibling of the Altim-O-Tron site: same design language, tuned to
   Track-O-Tron's own palette (taken from the app's Hi-Tech theme).
   No frameworks, no external requests.
   ========================================================================= */

/* ---- Tokens ---------------------------------------------------------- */
:root {
    --bg:        #0A111C;
    --panel:     #131C2D;
    --border:    #334766;
    --cyan:      #59D6E8;
    --blue:      #3FA9C4;
    --orange:    #F0A130;
    --good:      #40D68F;
    --text:      #EBF2F7;

    /* Derived tints. Kept as tokens so the whole site retunes from the
       colors above. */
    --text-dim:    rgba(235, 242, 247, 0.66);
    --text-faint:  rgba(235, 242, 247, 0.40);
    --border-soft: rgba(51, 71, 102, 0.55);
    --panel-soft:  rgba(19, 28, 45, 0.55);
    --glow-cyan:   rgba(89, 214, 232, 0.30);

    /* The app renders every label in the system monospaced face, so the
       site's headings match the app exactly with no webfont download. */
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
                 "Liberation Mono", monospace;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
                 Helvetica, Arial, sans-serif;

    --measure: 68ch;
    --radius: 14px;
    --section-pad: clamp(4.5rem, 11vh, 9rem);
    --gutter: clamp(1.25rem, 5vw, 3rem);
    --maxw: 1180px;
}

/* ---- Reset ----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
    -webkit-text-size-adjust: 100%;
    /* `clip` rather than `hidden`, and on html rather than body, on purpose:
       `overflow-x: hidden` on body makes body a scroll container, breaking
       window.scrollY and in-page anchors. `clip` never creates one. */
    overflow-x: clip;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: clamp(1rem, 0.97rem + 0.16vw, 1.0625rem);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #8fe6f4; }

:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
    border-radius: 4px;
}

::selection { background: rgba(89, 214, 232, 0.28); }

/* ---- Type ------------------------------------------------------------ */
h1, h2, h3, .mono {
    font-family: var(--font-mono);
    font-weight: 600;
    letter-spacing: 0.06em;
    line-height: 1.15;
    text-transform: uppercase;
}

h2 {
    font-size: clamp(1.6rem, 1.15rem + 2vw, 2.6rem);
    margin: 0 0 1.25rem;
}

h3 {
    font-size: 1rem;
    letter-spacing: 0.12em;
    margin: 0 0 0.6rem;
    color: var(--cyan);
}

p { margin: 0 0 1.1rem; max-width: var(--measure); }
p:last-child { margin-bottom: 0; }

.lede {
    font-size: clamp(1.06rem, 1rem + 0.4vw, 1.25rem);
    color: var(--text-dim);
}

/* Small uppercase instrument label — the app's panel captions. */
.label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--blue);
    margin: 0 0 0.75rem;
    display: block;
}

.readout {
    font-family: var(--font-mono);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--text);
    text-shadow: 0 0 22px var(--glow-cyan);
    letter-spacing: 0.02em;
}

.unit {
    font-family: var(--font-mono);
    color: var(--orange);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.aside-note {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    color: var(--text-faint);
    border-left: 2px solid var(--border);
    padding-left: 1rem;
    margin: 1.75rem 0 0;
    max-width: 46ch;
    text-transform: none;
    letter-spacing: 0;
    line-height: 1.6;
}

/* ---- Layout ---------------------------------------------------------- */
.wrap {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

section { padding-block: var(--section-pad); position: relative; }

.split {
    display: grid;
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: center;
    grid-template-columns: 1fr;
}

@media (min-width: 900px) {
    .split { grid-template-columns: 1fr 1fr; }
    .split.text-right > *:first-child { order: 2; }
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--panel);
    color: var(--text);
    padding: 0.75rem 1.25rem;
    z-index: 100;
    border: 1px solid var(--cyan);
    border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }

/* ---- Navigation ------------------------------------------------------ */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(10, 17, 28, 0.82);
    backdrop-filter: saturate(150%) blur(12px);
    -webkit-backdrop-filter: saturate(150%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.scrolled { border-bottom-color: var(--border-soft); }

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 62px;
}

.wordmark {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    color: var(--text);
    text-decoration: none;
    text-shadow: 0 0 18px var(--glow-cyan);
    white-space: nowrap;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 3vw, 2.25rem);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--cyan); }

@media (max-width: 640px) {
    .nav-links li:not(.nav-cta) { display: none; }
}

.nav-cta a {
    color: var(--cyan);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.4rem 0.95rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}
.nav-cta a:hover {
    border-color: var(--cyan);
    box-shadow: 0 0 18px rgba(89, 214, 232, 0.22);
}

/* ---- Ambient background ---------------------------------------------- */
/* Stacked, extremely quiet layers: a wandering route map, a drifting grid,
   and faint stars. All fixed, all pointer-inert, all behind everything. */
.ambient {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.ambient::before,
.ambient::after {
    content: "";
    position: absolute;
    inset: -20%;
}

/* Grid: drifts diagonally, one cell per 40s. */
.ambient::before {
    background-image:
        linear-gradient(rgba(63, 169, 196, 0.28) 1px, transparent 1px),
        linear-gradient(90deg, rgba(63, 169, 196, 0.28) 1px, transparent 1px);
    background-size: 64px 64px;
    animation: drift 40s linear infinite;
    mask-image: radial-gradient(ellipse 88% 70% at 50% 30%, #000 35%, transparent 85%);
    -webkit-mask-image: radial-gradient(ellipse 88% 70% at 50% 30%, #000 35%, transparent 85%);
}

/* Stars: pin-prick radial gradients, breathing slowly. */
.ambient::after {
    background-image:
        radial-gradient(1.5px 1.5px at 12% 18%, rgba(235,242,247,0.55), transparent),
        radial-gradient(1.5px 1.5px at 78% 8%,  rgba(235,242,247,0.42), transparent),
        radial-gradient(1px 1px   at 33% 62%,  rgba(235,242,247,0.38), transparent),
        radial-gradient(1.5px 1.5px at 62% 44%, rgba(235,242,247,0.30), transparent),
        radial-gradient(1px 1px   at 88% 72%,  rgba(235,242,247,0.45), transparent),
        radial-gradient(1px 1px   at 8%  84%,  rgba(235,242,247,0.34), transparent),
        radial-gradient(1.5px 1.5px at 47% 26%, rgba(89,214,232,0.40), transparent),
        radial-gradient(1px 1px   at 22% 40%,  rgba(235,242,247,0.28), transparent);
    animation: breathe 14s ease-in-out infinite;
}

@keyframes drift {
    from { transform: translate3d(0, 0, 0); }
    to   { transform: translate3d(64px, 64px, 0); }
}

@keyframes breathe {
    0%, 100% { opacity: 0.75; }
    50%      { opacity: 0.35; }
}

/* Sub-pages are long-form prose; damp the ambient layers for legibility. */
.page-sub .route-bg { opacity: 0.30; }
.page-sub .ambient::before { opacity: 0.45; }

/* Route watermark — an SVG background, sized to the viewport. */
.route-bg {
    position: absolute;
    inset: 0;
    background: url("../svg/route.svg") center / cover no-repeat;
    opacity: 0.85;
    mask-image: radial-gradient(ellipse 85% 85% at 50% 40%, #000 25%, transparent 88%);
    -webkit-mask-image: radial-gradient(ellipse 85% 85% at 50% 40%, #000 25%, transparent 88%);
}

/* ---- Hero ------------------------------------------------------------ */
.hero {
    padding-top: clamp(3rem, 8vh, 6rem);
    padding-bottom: var(--section-pad);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    gap: clamp(2.5rem, 6vw, 4.5rem);
    align-items: center;
    grid-template-columns: 1fr;
}

@media (min-width: 900px) {
    .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
}

.hero h1 {
    font-size: clamp(1.85rem, 0.9rem + 4.2vw, 3.75rem);
    letter-spacing: 0.08em;
    margin: 0 0 1.5rem;
    text-shadow: 0 0 40px rgba(89, 214, 232, 0.35);
    white-space: nowrap;
}

.hero-tagline {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 0.85rem + 0.75vw, 1.45rem);
    line-height: 1.4;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--cyan);
    margin: 0 0 1.75rem;
    max-width: 24ch;
}

.hero-sub {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
    margin-bottom: 2.25rem;
}
.hero-sub span { display: block; }

/* ---- Buttons --------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 0.9rem 1.6rem;
    border-radius: 999px;
    border: 1px solid var(--cyan);
    color: var(--bg);
    background: var(--cyan);
    box-shadow: 0 0 28px rgba(89, 214, 232, 0.28);
    transition: box-shadow 0.25s ease, transform 0.25s ease, background 0.25s ease;
}
.btn:hover {
    color: var(--bg);
    background: #83e2f0;
    box-shadow: 0 0 40px rgba(89, 214, 232, 0.45);
}
.btn:active { transform: translateY(1px); }

.btn-ghost {
    background: transparent;
    color: var(--cyan);
    border-color: var(--border);
    box-shadow: none;
}
.btn-ghost:hover {
    background: rgba(89, 214, 232, 0.08);
    color: var(--cyan);
    border-color: var(--cyan);
    box-shadow: 0 0 24px rgba(89, 214, 232, 0.18);
}

/* Pre-launch state: rendered as an inert status chip rather than a dead
   link. js/app.js swaps these for real links once APP_STORE_URL is set. */
.btn[data-pending] {
    cursor: default;
    background: transparent;
    color: var(--orange);
    border-color: rgba(240, 161, 48, 0.5);
    box-shadow: none;
}
.btn[data-pending]:hover {
    background: transparent;
    color: var(--orange);
    box-shadow: none;
}
.btn[data-pending]::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--orange);
    box-shadow: 0 0 10px var(--orange);
    animation: pulse 2.8s ease-in-out infinite;
    flex: none;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.25; }
}

.btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

/* ---- Panels & cards -------------------------------------------------- */
.panel {
    background: linear-gradient(160deg, var(--panel) 0%, rgba(13, 20, 33, 0.92) 100%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: clamp(1.4rem, 3vw, 2rem);
}

.cards {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
    margin-top: 3rem;
}

.card {
    background: linear-gradient(160deg, var(--panel) 0%, rgba(13, 20, 33, 0.9) 100%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1.6rem 1.5rem;
    transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
}

.card:hover {
    border-color: rgba(89, 214, 232, 0.45);
    box-shadow: 0 0 34px rgba(89, 214, 232, 0.12), inset 0 0 30px rgba(89, 214, 232, 0.05);
    transform: translateY(-3px);
}

.card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-dim);
}

.card-icon {
    display: block;
    margin-bottom: 1rem;
    color: var(--cyan);
}

/* ---- Milestone panel (recreated app banner) --------------------------- */
.milestone-panel {
    text-align: center;
    max-width: 34rem;
    margin-inline: auto;
    padding: clamp(1.8rem, 4vw, 2.75rem);
    position: relative;
    overflow: hidden;
}

.milestone-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(89, 214, 232, 0.10), transparent 62%);
    pointer-events: none;
}

.milestone-distance {
    font-size: clamp(3rem, 2rem + 6vw, 5rem);
    line-height: 1;
    margin: 0.35rem 0 0.25rem;
    display: block;
}

.milestone-rule {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 1.75rem auto;
    width: 72%;
}

.milestone-lead {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
    margin: 0 0 0.5rem;
    max-width: none;
}

.milestone-subject {
    font-family: var(--font-mono);
    font-size: clamp(1.05rem, 0.85rem + 1vw, 1.5rem);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--cyan);
    margin: 0;
    /* Two lines' worth, always reserved, so the panel height is stable. */
    min-height: 3.5em;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 0 26px var(--glow-cyan);
    transition: opacity 0.6s ease;
}

.milestone-subject.fading { opacity: 0; }

.milestone-count {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-top: 2rem;
    text-align: center;
}

/* ---- Unit chips ------------------------------------------------------ */
.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 2.5rem;
    list-style: none;
    padding: 0;
}

.chip {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 0.7rem 1.35rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(19, 28, 45, 0.6);
    color: var(--text-dim);
    transition: transform 0.3s cubic-bezier(0.2, 0.9, 0.3, 1),
                border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
    cursor: default;
}

.chip:hover {
    transform: scale(1.07);
    border-color: var(--cyan);
    color: var(--text);
    box-shadow: 0 0 24px rgba(89, 214, 232, 0.25);
}

.chip-odd:hover { border-color: var(--orange); box-shadow: 0 0 24px rgba(240, 161, 48, 0.25); }

/* ---- Stat rows ------------------------------------------------------- */
.stats {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 9.5rem), 1fr));
    margin-top: 2rem;
}

.stat {
    background: rgba(19, 28, 45, 0.55);
    border: 1px solid var(--border-soft);
    border-radius: 10px;
    padding: 1.1rem 1rem;
    text-align: center;
}

.stat .label { margin-bottom: 0.4rem; font-size: 0.66rem; }
.stat .readout { font-size: 1.5rem; display: block; }
.stat .unit { font-size: 0.7rem; }

/* ---- Privacy --------------------------------------------------------- */
.privacy-section { text-align: center; }

.privacy-headline {
    font-family: var(--font-mono);
    font-size: clamp(1.9rem, 1rem + 5.4vw, 4.6rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 1.15;
    margin: 0 0 3.5rem;
    text-transform: uppercase;
    text-shadow: 0 0 60px rgba(89, 214, 232, 0.28);
}

.no-list {
    list-style: none;
    margin: 0 auto;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1.15rem;
    max-width: 30rem;
}

.no-list li {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 0.9rem + 0.6vw, 1.3rem);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    padding-bottom: 1.15rem;
    border-bottom: 1px solid rgba(51, 71, 102, 0.35);
}
.no-list li:last-child { border-bottom: 0; }

.no-list li.final {
    color: var(--cyan);
    text-shadow: 0 0 26px var(--glow-cyan);
    text-transform: none;
    letter-spacing: 0.06em;
}

/* ---- Family (related products) ---------------------------------------- */
.family-cards {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    margin-top: 3rem;
}

.family-card {
    display: block;
    text-decoration: none;
    color: inherit;
    background: linear-gradient(160deg, var(--panel) 0%, rgba(13, 20, 33, 0.9) 100%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1.75rem 1.6rem;
    transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
}

.family-card:hover {
    border-color: rgba(89, 214, 232, 0.45);
    box-shadow: 0 0 34px rgba(89, 214, 232, 0.12);
    transform: translateY(-3px);
    color: inherit;
}

.family-card .wordmark { font-size: 0.95rem; display: block; margin-bottom: 0.6rem; }

.family-card p {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-dim);
}

.family-cta {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--cyan);
    display: inline-block;
    margin-top: 1.1rem;
}

/* ---- Pricing ---------------------------------------------------------- */
.pricing-panel {
    max-width: 42rem;
    margin-inline: auto;
    text-align: center;
    padding: clamp(1.8rem, 4vw, 2.75rem);
}

.pricing-panel .lede { margin-inline: auto; }

/* ---- Download -------------------------------------------------------- */
.download-section { text-align: center; }

.download-icon {
    width: 128px;
    height: 128px;
    margin: 0 auto 2rem;
    border-radius: 28px;
    box-shadow: 0 0 60px rgba(89, 214, 232, 0.25);
}

.download-section .btn-row { justify-content: center; margin-top: 2.25rem; }
.download-section p { margin-inline: auto; }

/* ---- Footer ---------------------------------------------------------- */
.footer {
    border-top: 1px solid var(--border-soft);
    padding-block: 3.5rem;
    background: rgba(10, 17, 28, 0.6);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
    align-items: flex-start;
}

.footer .wordmark { font-size: 0.85rem; display: block; margin-bottom: 0.75rem; }

.footer-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-faint);
    letter-spacing: 0.06em;
    margin: 0 0 0.5rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links a {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    text-decoration: none;
}
.footer-links a:hover { color: var(--cyan); }

.copyright {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-faint);
    letter-spacing: 0.08em;
    margin: 0;
}

/* ---- SVG instrument styling ------------------------------------------ */
.instrument { width: 100%; height: auto; display: block; overflow: visible; }

.tick { stroke: var(--border); stroke-width: 1.5; }

/* Traces draw themselves when scrolled into view. Dash values are set
   inline per-element by js/app.js; the transition animates them. */
.draw {
    stroke-dashoffset: var(--len, 1000);
    transition: stroke-dashoffset 2.2s cubic-bezier(0.33, 0.9, 0.3, 1);
}
.is-visible .draw, .draw.is-visible { stroke-dashoffset: 0; }

.trace {
    fill: none;
    stroke: var(--cyan);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    filter: drop-shadow(0 0 8px var(--glow-cyan));
}

.trace-track {
    stroke-width: 3.5;
}

.trace-fill {
    fill: url(#traceGradient);
    opacity: 0;
    transition: opacity 1.4s ease 1s;
}
.is-visible .trace-fill { opacity: 1; }

/* Map card: the hero's recreated recording screen. */
.map-card {
    background: linear-gradient(160deg, var(--panel) 0%, rgba(13, 20, 33, 0.92) 100%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 1.1rem;
    filter: drop-shadow(0 26px 60px rgba(0, 0, 0, 0.55));
}

.map-marker { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; }

/* ---- Scroll reveal --------------------------------------------------- */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.reveal.is-visible { opacity: 1; transform: none; }

.stagger > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.stagger.is-visible > * { opacity: 1; transform: none; }
.stagger.is-visible > *:nth-child(1) { transition-delay: 0.05s; }
.stagger.is-visible > *:nth-child(2) { transition-delay: 0.15s; }
.stagger.is-visible > *:nth-child(3) { transition-delay: 0.25s; }
.stagger.is-visible > *:nth-child(4) { transition-delay: 0.35s; }
.stagger.is-visible > *:nth-child(5) { transition-delay: 0.45s; }
.stagger.is-visible > *:nth-child(6) { transition-delay: 0.55s; }
.stagger.is-visible > *:nth-child(7) { transition-delay: 0.65s; }
.stagger.is-visible > *:nth-child(8) { transition-delay: 0.75s; }

/* ---- Sub-pages (privacy, support) ------------------------------------ */
.page-header {
    padding-top: clamp(3rem, 7vh, 5rem);
    padding-bottom: 1rem;
}

.page-header h1 {
    font-size: clamp(1.7rem, 1.2rem + 2.4vw, 2.9rem);
    margin: 0 0 0.75rem;
}

.effective {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--orange);
    margin: 0;
}

.prose { padding-block: 2rem clamp(4rem, 9vh, 7rem); }

.prose h2 {
    font-size: clamp(1.1rem, 0.95rem + 0.7vw, 1.4rem);
    color: var(--cyan);
    letter-spacing: 0.1em;
    margin-top: 3rem;
}
.prose h2:first-of-type { margin-top: 1.5rem; }

.prose ul { padding-left: 1.25rem; max-width: var(--measure); }
.prose li { margin-bottom: 0.7rem; color: var(--text-dim); }
.prose li strong { color: var(--text); }
.prose p { color: var(--text-dim); }
.prose .panel p { margin-bottom: 0; }
.prose .panel { margin-bottom: 2rem; }

.faq { margin-top: 1rem; }

.faq details {
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    background: rgba(19, 28, 45, 0.45);
    margin-bottom: 0.85rem;
    overflow: hidden;
}

.faq summary {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    letter-spacing: 0.06em;
    padding: 1.1rem 1.35rem;
    cursor: pointer;
    color: var(--text);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: color 0.2s ease;
}
.faq summary:hover { color: var(--cyan); }
.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
    content: "+";
    color: var(--cyan);
    font-size: 1.2rem;
    line-height: 1;
    flex: none;
}
.faq details[open] summary::after { content: "\2212"; }

.faq details > *:not(summary) {
    padding-inline: 1.35rem;
    color: var(--text-dim);
    font-size: 0.95rem;
}
.faq details > *:last-child { padding-bottom: 1.35rem; }

.contact-block {
    margin-top: 2.5rem;
    text-align: center;
}

.contact-email {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 0.9rem + 0.6vw, 1.3rem);
    letter-spacing: 0.06em;
    color: var(--cyan);
    text-shadow: 0 0 24px var(--glow-cyan);
    word-break: break-word;
}

/* ---- Motion & contrast preferences ----------------------------------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .reveal, .stagger > * { opacity: 1; transform: none; }
    .draw { stroke-dashoffset: 0; }
    .trace-fill { opacity: 1; }
}

@media print {
    .ambient, .nav, .instrument { display: none; }
    body { background: #fff; color: #000; }
}