/* ─── tokens ─────────────────────────────────────────────────────────
       Bound to the Fade app design system (see brand-spec.md). Base values
       are the app's own color assets; derived tones use color-mix(oklch).
       No raw hex is used outside this block. */
    :root {
      /* light page */
      --bg:      #F5F6F6;   /* CanvasColor (light) */
      --surface: #FFFFFF;   /* SurfaceColor (light) */
      --fg:      #101415;   /* brand charcoal */
      --muted:   #5A6160;   /* secondary text, 5.85:1 on canvas */
      --border:  color-mix(in oklch, var(--fg) 12%, var(--bg));
      --accent:  #006B61;   /* deep teal (light) */

      /* charcoal identity (app icon) */
      --hero-bg:           #101415;
      --hero-surface:      #1C2223;
      --hero-fg:           #F2F5F4;
      --hero-muted:        #98A0A0;
      --hero-border:       color-mix(in oklch, var(--hero-fg) 14%, var(--hero-bg));
      --hero-accent:       #69D6C5;   /* soft teal (dark) */
      --hero-accent-strong:#19BAA6;
      --hero-on-accent:    #0A2621;
      --hero-stroke-dim:   color-mix(in oklch, var(--hero-accent) 30%, var(--hero-bg));

      /* derived */
      --accent-soft: color-mix(in oklch, var(--accent) 14%, transparent);
      --fg-soft:     color-mix(in oklch, var(--fg) 6%, transparent);

      --font-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', system-ui, sans-serif;
      --font-body:    -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', system-ui, sans-serif;
      --font-mono:    ui-monospace, 'SF Mono', Menlo, monospace;

      --fs-h1: clamp(42px, 5.4vw, 68px);
      --fs-h2: clamp(30px, 3.6vw, 44px);
      --fs-h3: 21px;
      --fs-lead: 19px;
      --fs-body: 16px;
      --fs-meta: 13px;

      --gap-xs: 8px;
      --gap-sm: 12px;
      --gap-md: 20px;
      --gap-lg: 32px;
      --gap-xl: 56px;
      --gap-2xl: 96px;
      --container: 1120px;
      --gutter: 32px;

      --radius: 10px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }

    /* ─── reset & base ──────────────────────────────────────────────── */
    *, *::before, *::after { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--fg);
      font-family: var(--font-body);
      font-size: var(--fs-body);
      line-height: 1.55;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    img, svg { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button { font: inherit; cursor: pointer; }
    p { text-wrap: pretty; }
    h1, h2, h3, h4 { text-wrap: balance; }
    :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
    .hero-dark :focus-visible { outline-color: var(--hero-accent); }

    /* ─── layout primitives ─────────────────────────────────────────── */
    .container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
    .section { padding-block: clamp(56px, 8vw, var(--gap-2xl)); }
    .section + .section { border-top: 1px solid var(--border); }
    .stack { display: flex; flex-direction: column; }
    .stack > * + * { margin-top: var(--gap-md); }
    .row { display: flex; align-items: center; gap: var(--gap-md); }
    .row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--gap-md); }
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap-lg); }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-lg); }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap-md); }
    .grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: var(--gap-xl); align-items: start; }
    @media (max-width: 920px) {
      .grid-2, .grid-3, .grid-4, .grid-2-1 { grid-template-columns: 1fr; }
      :root { --gutter: 22px; }
    }

    /* ─── type ──────────────────────────────────────────────────────── */
    .h1, h1 { font-family: var(--font-display); font-size: var(--fs-h1); line-height: 1.03; letter-spacing: -0.028em; font-weight: 700; margin: 0; }
    .h2, h2 { font-family: var(--font-display); font-size: var(--fs-h2); line-height: 1.08; letter-spacing: -0.022em; font-weight: 700; margin: 0; }
    .h3, h3 { font-size: var(--fs-h3); font-weight: 600; line-height: 1.3; letter-spacing: -0.01em; margin: 0; }
    .lead { font-size: var(--fs-lead); line-height: 1.55; color: var(--muted); max-width: 60ch; margin: 0; }
    .eyebrow {
      font-family: var(--font-mono);
      font-size: 12px;
      letter-spacing: 0.09em;
      text-transform: uppercase;
      color: var(--accent);
      margin: 0 0 var(--gap-md);
    }
    .meta { font-family: var(--font-mono); font-size: var(--fs-meta); color: var(--muted); }
    .num  { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

    /* ─── chrome: nav + footer ──────────────────────────────────────── */
    .topnav {
      position: sticky; top: 0; z-index: 20;
      background: color-mix(in oklch, var(--bg) 88%, transparent);
      backdrop-filter: blur(14px) saturate(1.4);
      border-bottom: 1px solid var(--border);
    }
    .topnav-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 13px; gap: var(--gap-md); }
    .brand { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-display); font-size: 20px; font-weight: 700; letter-spacing: -0.02em; color: var(--fg); }
    .brand svg { color: var(--accent); }
    .topnav nav { display: flex; gap: var(--gap-lg); }
    .topnav nav a { font-size: 14px; color: var(--muted); }
    .topnav nav a:hover { color: var(--fg); }
    @media (max-width: 720px) { .topnav nav { display: none; } }
    .pagefoot { padding-block: var(--gap-xl); color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); }
    .pagefoot .row-between { flex-wrap: wrap; gap: var(--gap-md); align-items: flex-start; }
    .foot-note { max-width: 62ch; margin-top: var(--gap-md); color: var(--muted); font-size: 12px; line-height: 1.6; }

    /* ─── buttons ───────────────────────────────────────────────────── */
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      padding: 12px 22px; min-height: 44px;
      border-radius: var(--radius);
      border: 1px solid transparent;
      font-size: 15px; font-weight: 600; letter-spacing: -0.005em;
      transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.06s ease;
    }
    .btn:active { transform: translateY(1px); }
    .btn-primary { background: var(--accent); color: var(--surface); border-color: var(--accent); }
    .btn-primary:hover { background: color-mix(in oklch, var(--accent) 86%, black); border-color: color-mix(in oklch, var(--accent) 86%, black); }
    .btn-secondary { background: transparent; color: var(--fg); border-color: var(--border); }
    .btn-secondary:hover { border-color: var(--fg); background: var(--fg-soft); }
    .btn-ghost { background: transparent; color: var(--fg); border-color: transparent; padding-inline: 8px; }
    .btn-ghost:hover { color: var(--accent); }
    .btn-arrow::after { content: '→'; transition: transform 0.15s ease; }
    .btn-arrow:hover::after { transform: translateX(3px); }
    .btn-lg { padding: 14px 26px; font-size: 16px; }

    /* ─── card / surface ────────────────────────────────────────────── */
    .card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; }
    .card-flat { background: transparent; border: 0; padding: 0; }

    /* ─── feature cell ──────────────────────────────────────────────── */
    .feature .feature-mark {
      width: 38px; height: 38px; display: grid; place-items: center;
      border: 1px solid var(--border); border-radius: 11px;
      color: var(--fg); margin-bottom: var(--gap-md);
    }
    .feature .feature-mark svg { width: 19px; height: 19px; }
    .feature h3 { margin-bottom: 8px; }
    .feature p { margin: 0; color: var(--muted); font-size: 15px; }

    /* ─── stat ──────────────────────────────────────────────────────── */
    .stat .stat-num { font-family: var(--font-display); font-size: clamp(48px, 6vw, 76px); line-height: 0.95; letter-spacing: -0.04em; font-weight: 700; }
    .stat .stat-label { color: var(--muted); font-size: 14px; margin-top: 10px; max-width: 30ch; }

    /* ─── pill / tag ────────────────────────────────────────────────── */
    .pill { display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; background: var(--accent-soft); color: var(--accent); border-radius: 999px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; }
    .tag { display: inline-flex; align-items: center; padding: 5px 11px; background: transparent; color: var(--muted); border: 1px solid var(--border); border-radius: 999px; font-size: 12px; }

    /* ─── table ─────────────────────────────────────────────────────── */
    .ds-table { width: 100%; border-collapse: collapse; font-size: 14px; }
    .ds-table th, .ds-table td { padding: 13px 12px; text-align: left; border-bottom: 1px solid var(--border); }
    .ds-table th { color: var(--muted); font-weight: 500; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; text-transform: uppercase; }
    .ds-table td:nth-child(2) { font-weight: 600; }
    .ds-table tbody tr:hover { background: var(--fg-soft); }
    .ds-table .col-num { text-align: center; width: 20%; font-family: var(--font-mono); }
    .ds-table th:nth-child(2) { color: var(--fg); }
    .ds-table .yes { color: var(--fg); font-weight: 700; }
    .ds-table .no  { color: var(--muted); }
    @media (max-width: 560px) { .ds-table { font-size: 12.5px; } .ds-table th, .ds-table td { padding: 10px 6px; } .ds-table td:first-child, .ds-table th:first-child { width: 34%; } }

    /* ─── rule ──────────────────────────────────────────────────────── */
    .rule { border: 0; border-top: 1px solid var(--border); margin: 0; }

    /* ─── wordmark (four diminishing strokes) ───────────────────────── */
    .wordmark { width: 30px; height: 34px; }
    .wordmark rect { transform-box: fill-box; }

    /* ─── dark hero ─────────────────────────────────────────────────── */
    .hero-dark { background: var(--hero-bg); color: var(--hero-fg); }
    .hero-dark .eyebrow { color: var(--hero-accent); }
    .hero-dark .lead { color: var(--hero-muted); }
    .hero-dark .btn-primary { background: var(--hero-accent); color: var(--hero-on-accent); border-color: var(--hero-accent); }
    .hero-dark .btn-primary:hover { background: color-mix(in oklch, var(--hero-accent) 84%, white); border-color: color-mix(in oklch, var(--hero-accent) 84%, white); }
    .hero-dark .btn-ghost { color: var(--hero-fg); }
    .hero-dark .btn-ghost:hover { color: var(--hero-accent); }
    .hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(40px, 6vw, 80px); align-items: center; }
    @media (max-width: 920px) { .hero-grid { grid-template-columns: 1fr; gap: 48px; } }
    .hero { padding-block: clamp(72px, 11vw, 148px); }
    .hero h1 { margin-bottom: var(--gap-md); }
    .hero .lead { margin-bottom: var(--gap-lg); }
    .hero-cta { display: inline-flex; gap: var(--gap-sm); flex-wrap: wrap; }
    .hero-appmeta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: var(--gap-xl); padding-top: var(--gap-lg); border-top: 1px solid var(--hero-border); color: var(--hero-muted); font-size: 14px; }
    .hero-appmeta .dot { width: 4px; height: 4px; border-radius: 999px; background: var(--hero-accent); }

    /* ─── product specimen (faithful Overview motif) ────────────────── */
    .specimen {
      background: var(--hero-surface);
      border: 1px solid var(--hero-border);
      border-radius: var(--radius-xl);
      padding: 26px 26px 22px;
      box-shadow: 0 30px 60px -30px color-mix(in oklch, black 72%, transparent);
    }
    .specimen-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 26px; }
    .specimen .brand { color: var(--hero-fg); font-size: 16px; }
    .specimen .brand svg { color: var(--hero-accent); }
    .specimen-tag { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--hero-muted); border: 1px solid var(--hero-border); padding: 4px 8px; border-radius: 999px; }
    .specimen-label { font-size: 13px; color: var(--hero-muted); margin: 0 0 4px; }
    .specimen-amount { font-family: var(--font-display); font-weight: 700; font-size: clamp(34px, 5vw, 46px); letter-spacing: -0.03em; margin: 0; line-height: 1; }
    .specimen-amount span { font-size: 0.55em; color: var(--hero-muted); font-weight: 600; margin-left: 2px; }
    .specimen-cleared { margin: 10px 0 24px; font-size: 14px; color: var(--hero-muted); }
    .specimen-cleared b { color: var(--hero-accent); font-weight: 600; }
    .strokes { display: flex; align-items: flex-end; gap: 4px; height: 64px; }
    .strokes i { flex: 1 1 0; height: 54px; min-width: 2px; border-radius: 999px; background: var(--hero-stroke-dim); transform-origin: bottom; animation: stroke-in 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) both; }
    .strokes i:nth-child(-n+13) { height: 8px; background: var(--hero-accent); }
    .strokes i:nth-child(14) { height: 28px; background: var(--hero-accent); }
    @keyframes stroke-in { from { transform: scaleY(0.08); opacity: 0; } to { transform: scaleY(1); opacity: 1; } }
    .specimen-foot { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--hero-border); flex-wrap: wrap; }
    .specimen-pct { font-family: var(--font-display); font-weight: 700; font-size: 24px; letter-spacing: -0.02em; color: var(--hero-accent); }
    .specimen-motto { font-size: 13px; color: var(--hero-muted); }

    /* ─── audience / problem ────────────────────────────────────────── */
    .audience-head { max-width: 44ch; margin-bottom: var(--gap-xl); }
    .list-clean { list-style: none; margin: var(--gap-md) 0 0; padding: 0; }
    .list-clean li { display: flex; flex-wrap: wrap; gap: 4px 12px; padding: 13px 0; border-top: 1px solid var(--border); align-items: baseline; }
    .list-clean li:last-child { border-bottom: 1px solid var(--border); }
    .list-clean .k { font-weight: 600; flex: 0 0 auto; }
    .list-clean .v { color: var(--muted); font-size: 14px; }
    .side-title { font-size: 13px; font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin: 0 0 4px; }
    .pains { list-style: none; margin: var(--gap-md) 0 0; padding: 0; }
    .pains li { position: relative; padding: 12px 0 12px 26px; color: var(--muted); font-size: 15px; border-top: 1px solid var(--border); }
    .pains li::before { content: '×'; position: absolute; left: 2px; top: 11px; color: var(--muted); font-family: var(--font-mono); }
    .pains li:last-child { border-bottom: 1px solid var(--border); }

    /* ─── section heads ─────────────────────────────────────────────── */
    .sec-head { max-width: 46ch; margin-bottom: var(--gap-xl); }
    .sec-head.center { text-align: center; margin-inline: auto; }

    /* ─── compare ───────────────────────────────────────────────────── */
    .compare-caveat { margin-top: var(--gap-lg); color: var(--muted); font-size: 13px; max-width: 62ch; }
    .more-link { display: inline-flex; align-items: center; gap: 6px; margin-top: var(--gap-lg); font-size: 15px; font-weight: 600; color: var(--fg); border-bottom: 1px solid var(--border); padding-bottom: 2px; transition: color 0.15s ease, border-color 0.15s ease; }
    .more-link::after { content: '→'; transition: transform 0.15s ease; }
    .more-link:hover { color: var(--accent); border-color: var(--accent); }
    .more-link:hover::after { transform: translateX(3px); }
    .foot-links { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: var(--gap-md); }
    .foot-links a { color: var(--muted); }
    .foot-links a:hover { color: var(--fg); }

    /* ─── pricing ───────────────────────────────────────────────────── */
    .price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-lg); align-items: stretch; }
    @media (max-width: 920px) { .price-grid { grid-template-columns: 1fr; } }
    .price-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 34px; display: flex; flex-direction: column; }
    .price-card.featured { border: 1.5px solid var(--fg); }
    .price-name { font-family: var(--font-display); font-size: 20px; font-weight: 700; letter-spacing: -0.01em; margin: 0; }
    .price-sub { color: var(--muted); font-size: 14px; margin: 6px 0 0; }
    .price-amount { font-family: var(--font-display); font-weight: 700; font-size: clamp(38px, 4.4vw, 52px); letter-spacing: -0.035em; margin: 24px 0 0; line-height: 1; }
    .price-unit { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
    .price-list { list-style: none; margin: 26px 0 0; padding: 0; flex: 1 1 auto; }
    .price-list li { display: flex; gap: 11px; padding: 11px 0; border-top: 1px solid var(--border); font-size: 15px; align-items: flex-start; }
    .price-list li svg { flex: 0 0 auto; width: 17px; height: 17px; color: var(--fg); margin-top: 3px; }
    .price-list li.dim svg { color: var(--muted); }
    .price-cta { margin-top: 26px; }
    .price-cta .btn { width: 100%; }
    .price-foot { margin-top: var(--gap-lg); color: var(--muted); font-size: 13px; max-width: 74ch; }

    /* ─── lifetime / what you get ───────────────────────────────────── */
    .app-icon { width: 76px; height: 76px; border-radius: 23%; box-shadow: 0 16px 32px -18px color-mix(in oklch, var(--fg) 55%, transparent); }
    .get-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap-lg); }
    @media (max-width: 920px) { .get-grid { grid-template-columns: 1fr; } }
    .get-item { padding-top: 22px; border-top: 1px solid var(--border); }
    .get-item h3 { margin-bottom: 8px; }
    .get-item p { margin: 0; color: var(--muted); font-size: 15px; }
    .dayone { display: flex; gap: 18px; align-items: center; padding: 22px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); }
    .dayone p { margin: 0; font-size: 15px; color: var(--muted); }
    .dayone strong { color: var(--fg); }

    /* ─── privacy ───────────────────────────────────────────────────── */
    .privacy-mark { color: var(--accent); }
    .promise h3 { margin-bottom: 8px; }
    .promise p { margin: 0; color: var(--muted); font-size: 15px; }
    .promise { padding-top: 22px; border-top: 1px solid var(--border); }

    /* ─── final CTA ─────────────────────────────────────────────────── */
    .cta-strip { text-align: center; }
    .cta-strip .container { max-width: 620px; }
    .cta-strip p.lead { margin: 18px auto 32px; }

    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      .strokes i { animation: none; }
      .btn, .btn-arrow::after { transition: none; }
    }