/* =========================================================================
   TrackIt — design system
   Principles: respond on press, springs over durations, translucent chrome,
   size-specific tracking, and gentle fallbacks for reduced motion/transparency.
   ========================================================================= */

:root {
    /* Palette — warm dark brand with sand light sections */
    --ink: #181512;
    --ink-2: #211d18;
    --ink-3: #2a251f;
    --ink-line: rgba(255, 255, 255, 0.08);
    --sand: #ebe6e1;
    --paper: #faf8f6;
    --media: #e9e4df;
    --accent: #e0492f;
    --accent-h: #f05a3f;
    --ok: #2ecc8f;
    --err: #ff5c6c;

    --on-dark: #f5f2ee;
    --on-dark-2: rgba(245, 242, 238, 0.64);
    --on-dark-3: rgba(245, 242, 238, 0.42);
    --on-light: #1d1a17;
    --on-light-2: rgba(29, 26, 23, 0.62);
    --on-light-3: rgba(29, 26, 23, 0.4);
    --hairline-light: rgba(29, 26, 23, 0.1);

    /* Materials */
    --glass-dark: rgba(24, 21, 18, 0.72);
    --glass-dark-heavy: rgba(33, 29, 24, 0.78);
    --glass-chip: rgba(255, 255, 255, 0.12);
    --glass-chip-h: rgba(255, 255, 255, 0.2);
    --glass-edge: rgba(255, 255, 255, 0.14);
    --blur: blur(20px) saturate(180%);
    --blur-heavy: blur(32px) saturate(180%);

    /* Geometry */
    --radius-xl: 36px;
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --gutter: clamp(1.25rem, 4vw, 2.5rem);
    --max: 70rem;
    --nav-h: 3.25rem;

    /* Motion — critically damped spring (response 0.4s) sampled into linear() */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in: cubic-bezier(0.64, 0, 0.78, 0);
    --spring: var(--ease-out);
    --spring-dur: 600ms;

    --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@supports (transition-timing-function: linear(0, 1)) {
    :root {
        --spring: linear(0, 0.0582, 0.1823, 0.3238, 0.4588, 0.5768, 0.6749, 0.7536, 0.8153, 0.8628, 0.8988, 0.9259, 0.946, 0.9608, 0.9717, 0.9796, 0.9854, 0.9895, 0.9925, 0.9947, 0.9962, 0.9973, 0.9981, 0.9987, 1);
    }
}

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-padding-top: calc(var(--nav-h) + 1rem);
    background: var(--ink);
}

body {
    margin: 0;
    font: 400 1.0625rem/1.5 var(--font);
    letter-spacing: 0;
    color: var(--on-dark);
    background: var(--ink);
    font-optical-sizing: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    -webkit-tap-highlight-color: transparent;
}

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; }

:focus-visible {
    outline: 2px solid var(--accent-h);
    outline-offset: 3px;
    border-radius: 6px;
}

[hidden] { display: none !important; }

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

.container {
    width: min(100% - 2 * var(--gutter), var(--max));
    margin-inline: auto;
}

/* =========================================================================
   Type scale — tracking tightens as size grows, leading shrinks
   ========================================================================= */
.display {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8.4vw, 6.75rem);
    font-weight: 800;
    line-height: 1.0;
    letter-spacing: -0.038em;
    text-wrap: balance;
}

.title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.028em;
    text-wrap: balance;
}

.headline {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 650;
    line-height: 1.22;
    letter-spacing: -0.012em;
}

.lead {
    font-size: clamp(1.0625rem, 1.6vw, 1.3125rem);
    line-height: 1.45;
    letter-spacing: -0.006em;
    color: var(--on-dark-2);
    text-wrap: pretty;
}

.caption {
    font-size: 0.8125rem;
    line-height: 1.38;
    letter-spacing: 0.01em;
}

.eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 650;
    line-height: 1;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-h);
    margin-bottom: 0.875rem;
}

/* =========================================================================
   Buttons — feedback lives on the press
   ========================================================================= */
.btn {
    --btn-bg: var(--accent);
    --btn-bg-h: var(--accent-h);
    --btn-fg: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 2.875rem;
    padding: 0.75rem 1.375rem;
    border: 0;
    border-radius: 999px;
    background: var(--btn-bg);
    color: var(--btn-fg);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.1;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
    transition:
        transform 160ms var(--ease-out),
        background-color 200ms ease,
        opacity 200ms ease,
        box-shadow 200ms ease;
}
.btn:hover { background: var(--btn-bg-h); }
.btn:active { transform: scale(0.97); transition-duration: 100ms; }

.btn-glass {
    --btn-bg: var(--glass-chip);
    --btn-bg-h: var(--glass-chip-h);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    box-shadow: inset 0 1px 0 var(--glass-edge);
}

.btn-quiet {
    --btn-bg: transparent;
    --btn-bg-h: rgba(255, 255, 255, 0.08);
    --btn-fg: var(--on-dark);
}

.btn-sm {
    min-height: 2rem;
    padding: 0.4375rem 0.875rem;
    font-size: 0.875rem;
}

.btn .chev {
    width: 0.5rem;
    height: 0.8125rem;
    flex: none;
    transition: transform 200ms var(--ease-out);
}
.btn:hover .chev { transform: translateX(2px); }

.icon-btn {
    display: inline-grid;
    place-items: center;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--glass-chip);
    color: var(--on-dark);
    cursor: pointer;
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    box-shadow: inset 0 1px 0 var(--glass-edge);
    transition: transform 160ms var(--ease-out), background-color 200ms ease, opacity 250ms ease;
    touch-action: manipulation;
}
.icon-btn:hover { background: var(--glass-chip-h); }
.icon-btn:active { transform: scale(0.92); transition-duration: 100ms; }
.icon-btn:disabled { opacity: 0.32; cursor: default; }
.icon-btn:disabled:active { transform: none; }
.icon-btn svg { width: 1.125rem; height: 1.125rem; }

/* =========================================================================
   Navigation — a translucent floating layer, content scrolls under it
   ========================================================================= */
.nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    height: var(--nav-h);
    color: var(--on-dark);
}

.nav::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--glass-dark);
    -webkit-backdrop-filter: var(--blur);
    backdrop-filter: var(--blur);
    box-shadow: inset 0 -0.5px 0 rgba(255, 255, 255, 0);
    transition: box-shadow 300ms ease, background-color 300ms ease;
}

/* Scroll edge effect — a soft fade only where content meets the chrome */
.nav::after {
    content: "";
    position: absolute;
    inset: 100% 0 auto 0;
    height: 1.25rem;
    background: linear-gradient(to bottom, rgba(10, 8, 6, 0.28), rgba(10, 8, 6, 0));
    opacity: 0;
    transition: opacity 300ms ease;
    pointer-events: none;
}
.nav.is-scrolled::after { opacity: 1; }
.nav.is-scrolled::before { box-shadow: inset 0 -0.5px 0 rgba(255, 255, 255, 0.1); }

.nav-inner {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    height: 2.75rem;
    border-radius: 8px;
}
.nav-logo img { height: 1.375rem; width: auto; }
.nav-logo .back-chev { width: 0.5625rem; height: 0.9375rem; opacity: 0.8; }

.nav-links {
    display: none;
    align-items: center;
    gap: 0.375rem;
}
.nav-links a:not(.btn) {
    padding: 0.5rem 0.75rem;
    border-radius: 999px;
    font-size: 0.875rem;
    letter-spacing: 0.005em;
    color: var(--on-dark-2);
    transition: color 200ms ease, background-color 200ms ease;
}
.nav-links a:not(.btn):hover { color: var(--on-dark); background: rgba(255, 255, 255, 0.06); }

/* Menu button — two bars morph into a cross */
.menu-btn {
    position: relative;
    width: 2.75rem;
    height: 2.75rem;
    margin-right: -0.625rem;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    touch-action: manipulation;
    transition: background-color 200ms ease, transform 160ms var(--ease-out);
}
.menu-btn:active { transform: scale(0.92); transition-duration: 100ms; }
.menu-btn span {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 1.125rem;
    height: 1.5px;
    margin-left: -0.5625rem;
    border-radius: 2px;
    background: currentColor;
    transition: transform 420ms var(--spring);
}
.menu-btn span:nth-child(1) { transform: translateY(-3.5px); }
.menu-btn span:nth-child(2) { transform: translateY(3.5px); }
.menu-btn[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { transform: rotate(-45deg); }

/* Menu sheet — originates from its trigger, exits along the same path */
.nav-sheet {
    position: fixed;
    top: calc(var(--nav-h) + 0.5rem);
    right: var(--gutter);
    z-index: 99;
    width: min(20rem, 100% - 2 * var(--gutter));
    padding: 0.5rem;
    border-radius: 22px;
    background: var(--glass-dark-heavy);
    -webkit-backdrop-filter: var(--blur-heavy);
    backdrop-filter: var(--blur-heavy);
    box-shadow:
        inset 0 1px 0 var(--glass-edge),
        0 24px 48px -12px rgba(0, 0, 0, 0.55),
        0 2px 8px rgba(0, 0, 0, 0.25);
    transform-origin: calc(100% - 1.25rem) -0.75rem;
    opacity: 0;
    visibility: hidden;
    filter: blur(8px);
    transform: scale(0.9);
    transition:
        opacity 220ms var(--ease-in),
        transform 260ms var(--ease-in),
        filter 220ms var(--ease-in),
        visibility 0s linear 260ms;
}
.nav-sheet.is-open {
    opacity: 1;
    visibility: visible;
    filter: blur(0);
    transform: scale(1);
    transition:
        opacity 260ms var(--ease-out),
        transform var(--spring-dur) var(--spring),
        filter 300ms var(--ease-out),
        visibility 0s;
}
.nav-sheet p {
    padding: 0.75rem 0.875rem 0.5rem;
    color: var(--on-dark-2);
}
.nav-sheet a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 2.875rem;
    padding: 0 0.875rem;
    border-radius: 14px;
    font-weight: 500;
    transition: background-color 150ms ease;
}
.nav-sheet a:hover, .nav-sheet a:active { background: rgba(255, 255, 255, 0.08); }
.nav-sheet a svg { width: 0.5rem; height: 0.8125rem; opacity: 0.45; }
.nav-sheet a.sheet-cta {
    margin-top: 0.375rem;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}
.nav-sheet a.sheet-cta:hover, .nav-sheet a.sheet-cta:active { background: var(--accent-h); }
.nav-sheet a.sheet-cta svg { opacity: 0.85; }
.nav-sheet hr {
    height: 0.5px;
    margin: 0.25rem 0.875rem;
    border: 0;
    background: rgba(255, 255, 255, 0.12);
}

@media (min-width: 48rem) {
    .nav-links { display: flex; }
    .menu-btn, .nav-sheet { display: none; }
}

/* =========================================================================
   Hero
   ========================================================================= */
.hero {
    position: relative;
    display: flex;
    align-items: flex-end;
    min-height: 100vh;
    min-height: 100svh;
    overflow: hidden;
    isolation: isolate;
    background: var(--ink);
    color: #fff;
}

.hero-video {
    position: absolute;
    inset: 0;
    z-index: -2;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-scrim {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(to bottom, rgba(24, 21, 18, 0.45) 0%, rgba(24, 21, 18, 0) 22%),
        linear-gradient(to right, rgba(24, 21, 18, 0.55) 0%, rgba(24, 21, 18, 0.15) 60%, rgba(24, 21, 18, 0) 100%),
        linear-gradient(to bottom, rgba(24, 21, 18, 0) 35%, rgba(24, 21, 18, 0.55) 70%, var(--ink) 100%);
}

.hero-content {
    position: relative;
    padding-block: calc(var(--nav-h) + 4rem) clamp(4.5rem, 12vh, 8rem);
    will-change: transform, opacity;
}

.hero .display { max-width: 11ch; margin-bottom: 1.25rem; }
.hero .lead {
    max-width: 30ch;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.82);
    font-weight: 500;
}
.hero .eyebrow { color: rgba(255, 255, 255, 0.78); }

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.hero-toggle {
    position: absolute;
    right: 0;
    bottom: clamp(4.5rem, 12vh, 8rem);
}
.hero-toggle .i-play { display: none; }
.hero-toggle[aria-pressed="true"] .i-play { display: block; }
.hero-toggle[aria-pressed="true"] .i-pause { display: none; }


/* =========================================================================
   Sections
   ========================================================================= */
.section {
    position: relative;
    padding-block: clamp(4.5rem, 10vw, 8.5rem);
}

.section-dark { background: var(--ink); color: var(--on-dark); }
.section-dark + .section-dark { padding-top: 0; }

.section-light {
    background: var(--sand);
    color: var(--on-light);
}
.section-light .lead { color: var(--on-light-2); }
.section-light .eyebrow { color: var(--accent); }

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: clamp(2rem, 4vw, 3rem);
}
.section-head .lead { max-width: 34ch; margin-top: 1rem; }

/* =========================================================================
   Carousel — transform-driven track with spring physics (see site.js)
   ========================================================================= */
.carousel { position: relative; }

.carousel-controls {
    display: none;
    gap: 0.625rem;
    flex: none;
}
@media (min-width: 48rem) {
    .carousel-controls { display: flex; }
}

.carousel-viewport {
    overflow: hidden;
    overflow: clip;
    padding-block: 0.5rem 1rem;
    outline: none;
}
.carousel-viewport:focus-visible { outline: none; }
.carousel-viewport:focus-visible .card.is-current { box-shadow: inset 0 0 0 1px var(--ink-line), 0 0 0 2px var(--accent-h); }

/* Percentage padding resolves against the full-width viewport, so the first
   card lines up with .container while the rest bleed to the screen edge. */
.carousel-track {
    --inset: max(var(--gutter), calc((100% - var(--max)) / 2));
    position: relative;
    display: flex;
    gap: clamp(0.75rem, 1.6vw, 1.25rem);
    width: max-content;
    padding-inline: var(--inset);
    touch-action: pan-y pinch-zoom;
    user-select: none;
    -webkit-user-select: none;
    cursor: grab;
    will-change: transform;
}
.carousel-track.is-dragging { cursor: grabbing; }
.carousel.is-static .carousel-controls { visibility: hidden; }
.carousel.is-static .carousel-track { cursor: auto; }
.carousel-track img, .carousel-track video { -webkit-user-drag: none; user-select: none; pointer-events: none; }

.card {
    position: relative;
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    width: clamp(17rem, 76vw, 21.25rem);
    border-radius: var(--radius-lg);
    background: var(--ink-2);
    overflow: hidden;
    box-shadow: inset 0 0 0 1px var(--ink-line);
    transition: transform 200ms var(--ease-out), box-shadow 200ms ease;
}
.card.is-pressed { transform: scale(0.985); transition-duration: 100ms; }

.card-media {
    position: relative;
    display: grid;
    place-items: center;
    aspect-ratio: 4 / 5;
    background:
        radial-gradient(120% 90% at 50% 0%, #f4f1ee 0%, var(--media) 60%, #e2dcd6 100%);
    overflow: hidden;
}
.card-media img,
.card-media video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.card-media .phone { padding: 1.5rem 1.5rem 0; object-position: bottom; }
.card-media .fill { object-fit: cover; }
.card-media .pad { padding: 1rem; }

.card-body {
    padding: 1.25rem 1.375rem 1.5rem;
}
.card-body h3 {
    margin-bottom: 0.375rem;
    color: var(--on-dark);
}
.card-body p {
    font-size: 0.9375rem;
    line-height: 1.42;
    color: var(--on-dark-2);
}

.card-link {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: inherit;
}
.card-link:focus-visible { outline-offset: -3px; }
.card-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-h);
}
.card-tag svg { width: 0.5rem; height: 0.75rem; }

/* Pager — the active dot stretches continuously with the track position */
.carousel-dots {
    display: flex;
    justify-content: center;
    margin-top: 1.25rem;
}
.carousel-dots button {
    display: grid;
    place-items: center;
    height: 1.75rem;
    min-width: 1.25rem;
    padding: 0 0.1875rem;
    border: 0;
    background: none;
    cursor: pointer;
    touch-action: manipulation;
}
.carousel-dots i {
    display: block;
    width: calc(0.4375rem + 1rem * var(--p, 0));
    height: 0.4375rem;
    border-radius: 999px;
    background: rgb(255 255 255 / calc(0.28 + 0.72 * var(--p, 0)));
}

/* =========================================================================
   System requirements — iOS inset-grouped lists
   ========================================================================= */
.req-intro {
    display: grid;
    gap: 1rem;
    max-width: 40rem;
}

.req-devices {
    width: min(100%, 60rem);
    margin: clamp(1.5rem, 4vw, 3rem) auto clamp(0.5rem, 1vw, 1rem);
}

.req-grid {
    display: grid;
    gap: 1.5rem;
}
@media (min-width: 48rem) {
    .req-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
}

.group-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1.25rem 0.625rem;
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.005em;
    color: var(--on-light-2);
}
.group-title svg { width: 1rem; height: 1rem; }

.group {
    padding: 0 1.25rem;
    border-radius: var(--radius-md);
    background: var(--paper);
    box-shadow: 0 1px 2px rgba(29, 26, 23, 0.04), 0 8px 24px -12px rgba(29, 26, 23, 0.12);
}
.group li {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    min-height: 3.25rem;
    padding: 0.9375rem 0;
    box-shadow: inset 0 -0.5px 0 var(--hairline-light);
}
.group li:last-child { box-shadow: none; }
.group .k { font-weight: 500; }
.group .v { flex: none; color: var(--on-light-2); text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }

/* =========================================================================
   Final call to action
   ========================================================================= */
.cta-panel {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    margin-top: clamp(4.5rem, 10vw, 8rem);
    padding: clamp(2.5rem, 7vw, 5.5rem) clamp(1.5rem, 6vw, 5rem);
    border-radius: var(--radius-xl);
    background: var(--ink);
    color: var(--on-dark);
}
.cta-panel::before {
    content: "";
    position: absolute;
    inset: -40% -20% auto auto;
    z-index: -1;
    width: 70%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(closest-side, rgba(224, 73, 47, 0.46), rgba(224, 73, 47, 0.16) 55%, rgba(224, 73, 47, 0));
    filter: blur(24px);
}
.cta-panel::after {
    content: "";
    position: absolute;
    inset: auto auto -50% -15%;
    z-index: -1;
    width: 55%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(closest-side, rgba(240, 90, 63, 0.18), rgba(240, 90, 63, 0));
}
.cta-icon {
    width: 4.5rem;
    height: 4.5rem;
    margin-bottom: 1.75rem;
    border-radius: 22.5%;
    background: #fff;
    padding: 0.625rem;
    box-shadow: 0 12px 32px -8px rgba(224, 73, 47, 0.45), inset 0 -1px 0 rgba(0, 0, 0, 0.06);
}
.cta-panel .title { max-width: 14ch; margin-bottom: 1rem; }
.cta-panel .lead { max-width: 34ch; margin-bottom: 2rem; color: var(--on-dark-2); }
.cta-panel .hero-actions .btn-glass { --btn-bg: rgba(255, 255, 255, 0.1); }

/* =========================================================================
   Footer
   ========================================================================= */
.footer {
    padding-block: clamp(3.5rem, 7vw, 5rem) 2.5rem;
    background: var(--ink);
    color: var(--on-dark-2);
    font-size: 0.875rem;
}
.footer-top {
    display: grid;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
    box-shadow: inset 0 -0.5px 0 rgba(255, 255, 255, 0.12);
}
@media (min-width: 48rem) {
    .footer-top { grid-template-columns: 1.4fr 1fr auto; align-items: start; }
}
.footer-brand img { width: 7.5rem; margin-bottom: 1rem; }
.footer-brand p { max-width: 26ch; }
.footer h3 {
    margin-bottom: 0.875rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--on-dark-3);
}
.footer-links li + li { margin-top: 0.125rem; }
.footer-links a, .footer-legal a {
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    transition: color 150ms ease;
}
.footer-links a:hover, .footer-legal a:hover { color: var(--on-dark); }
.social { display: flex; gap: 0.625rem; }
.social a {
    display: block;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    opacity: 0.72;
    transition: opacity 200ms ease, transform 160ms var(--ease-out);
}
.social a:hover { opacity: 1; }
.social a:active { transform: scale(0.92); transition-duration: 100ms; }
.social img { width: 100%; height: 100%; }

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 2rem;
    padding-top: 1.5rem;
    font-size: 0.8125rem;
    color: var(--on-dark-3);
}
.footer-legal { display: flex; flex-wrap: wrap; gap: 0 1.25rem; }
.footer-legal li { display: flex; align-items: center; min-height: 2rem; }

/* =========================================================================
   Reveal on scroll (only when JS is running)
   ========================================================================= */
.js [data-reveal] {
    opacity: 0;
    transform: translateY(1.25rem);
    transition:
        opacity 700ms var(--ease-out) var(--d, 0ms),
        transform 800ms var(--spring) var(--d, 0ms);
}
.js [data-reveal].is-in {
    opacity: 1;
    transform: none;
}

/* =========================================================================
   Accessibility preferences
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
    }
    .js [data-reveal] { transform: none; transition: opacity 300ms ease; }
    .nav-sheet, .nav-sheet.is-open {
        transform: none;
        filter: none;
        transition: opacity 200ms ease, visibility 0s linear 200ms;
    }
    .nav-sheet.is-open { transition: opacity 200ms ease, visibility 0s; }
    .menu-btn span { transition: none; }
    .btn:active, .icon-btn:active, .card.is-pressed { transform: none; }
    .hero-content { will-change: auto; }
}

@media (prefers-reduced-transparency: reduce) {
    .nav::before { background: var(--ink); -webkit-backdrop-filter: none; backdrop-filter: none; }
    .nav-sheet { background: var(--ink-3); -webkit-backdrop-filter: none; backdrop-filter: none; }
    .btn-glass, .icon-btn { --btn-bg: var(--ink-3); background: var(--ink-3); -webkit-backdrop-filter: none; backdrop-filter: none; }
}

@media (prefers-contrast: more) {
    :root {
        --on-dark-2: rgba(245, 242, 238, 0.86);
        --on-dark-3: rgba(245, 242, 238, 0.7);
        --on-light-2: rgba(29, 26, 23, 0.85);
        --ink-line: rgba(255, 255, 255, 0.4);
    }
    .nav::before { background: var(--ink); box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.5); }
    .nav-sheet { background: var(--ink-3); box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.5); }
    .btn-glass, .icon-btn { box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.6); }
    .group { box-shadow: 0 0 0 1px rgba(29, 26, 23, 0.4); }
}

/* ============ Task brief (study) ============ */
.task-steps{
  list-style:none;margin:2.5rem 0 0;padding:0;
  display:grid;gap:.75rem;counter-reset:task;
}
.task-steps li{
  display:flex;align-items:flex-start;gap:1.125rem;
  padding:1.25rem 1.5rem;border-radius:var(--radius-lg);
  background:var(--ink-2);box-shadow:inset 0 0 0 1px var(--ink-line);
  font-size:1rem;line-height:1.5;color:var(--on-dark-2);
}
.task-steps li b{color:var(--on-dark);font-weight:600}
.task-num{
  display:inline-grid;place-items:center;flex:0 0 2.25rem;height:2.25rem;
  border-radius:50%;background:rgba(224,73,47,.16);color:var(--accent-h);
  font-weight:700;font-size:1rem;font-variant-numeric:tabular-nums;
}