/* ==========================================================================
   StoneTell — Phase 0 landing
   Design tokens lifted from design/tokens.json (light mode subset).
   Naming kept kebab-case to match the token paths.
   ========================================================================== */

:root {
  /* --- color.primitive (subset) --- */
  --paper-100: #FBF8F1;   /* specimen card face */
  --paper-200: #F7F2E8;   /* page base — the anchor */
  --paper-300: #EFE7D7;   /* sunken / inputs / punch hole */
  --paper-400: #E6DCC8;   /* hairline assist */
  --paper-500: #D8CCB2;   /* debossed / unearned */

  --night-900: #1C1A17;
  --ink-300: #B0A796;
  --ink-400: #8A8073;
  --ink-500: #6B6155;     /* secondary text (AA 5.4:1) */
  --ink-600: #514A41;
  --ink-700: #3E3831;     /* stamp ink, secondary heads */
  --ink-900: #2B2622;     /* primary text / primary button */
  --ink-950: #1C1A17;

  --sandstone-100: #F0E4CE;
  --sandstone-300: #D4BB8E;
  --sandstone-400: #C9A87C;
  --terracotta-300: #D18C64;
  --terracotta-400: #B4552D;
  --terracotta-700: #5E2C19;
  --moss-200: #C9D3B5;
  --moss-400: #6B7F59;
  --rock-gray-400: #8A8578;
  --rock-gray-700: #403D38;

  /* mineral accents — collection colors only (badges, confidence, mascot) */
  --lapis-100: #DCE6F0;
  --lapis-500: #26507F;
  --lapis-700: #152C47;
  --malachite-100: #DEECE5;
  --malachite-500: #3E8E6E;
  --malachite-700: #235641;
  --amber-100: #F8ECD4;
  --amber-400: #D9A441;
  --amber-700: #6F511D;
  --fluorite-100: #EAE2F2;
  --fluorite-200: #D0BFE3;
  --fluorite-500: #7A5C9E;
  --fluorite-700: #483560;
  --hematite-100: #F4DBD5;
  --hematite-500: #A63D2F;
  --hematite-700: #62251D;

  /* --- color.semantic.light (subset) --- */
  --surface-page: var(--paper-200);
  --surface-card: var(--paper-100);
  --surface-sunken: var(--paper-300);
  --ink-primary: var(--ink-900);
  --ink-secondary: var(--ink-500);
  --ink-tertiary: var(--ink-400);
  --line-hairline: #2B26222E;   /* ink-900 @18% */
  --line-strong: #2B262259;     /* ink-900 @35% */
  --line-dashed: #8A857880;     /* rock-gray-400 @50% */
  --control-primary-bg: var(--ink-900);
  --control-primary-ink: var(--paper-100);
  --control-primary-pressed: var(--ink-700);
  --control-focus-ring: var(--lapis-500);
  --selection-bg: var(--lapis-100);
  --selection-border: var(--lapis-500);
  --badge-ink-common: var(--ink-700);
  --badge-ink-rare: var(--lapis-500);
  --badge-ink-epic: var(--fluorite-500);
  --badge-ink-legendary: #B98931;
  --mascot-accent: var(--fluorite-500);
  --feedback-warning-surface: var(--amber-100);
  --feedback-warning-ink: var(--amber-700);
  --feedback-error-surface: var(--hematite-100);
  --feedback-error-ink: var(--hematite-700);

  /* --- font-family --- */
  --font-display: "Source Serif 4", "Noto Serif SC", Georgia, serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;
  --font-mascot: "Baloo 2", var(--font-body);

  /* --- radius / chamfer / border-width --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;    /* specimen card */
  --radius-xl: 16px;
  --chamfer-sm: 3px;
  --chamfer-md: 6px;
  --chamfer-lg: 10px;
  --bw-hairline: 0.5px;
  --bw-thin: 1px;
  --bw-medium: 1.5px;

  /* --- shadow (paper feel: low blur, warm ink color, downward) --- */
  --shadow-card: 0 2px 6px rgba(43, 38, 34, 0.12);
  --shadow-raised: 0 4px 12px rgba(43, 38, 34, 0.16);
  --shadow-pressed: inset 0 1px 2px rgba(43, 38, 34, 0.20);
  --shadow-float: 0 8px 24px rgba(43, 38, 34, 0.22);

  /* --- spacing (4pt grid) --- */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px;
  --sp-12: 48px; --sp-16: 64px;

  --ease-decelerate-gravity: cubic-bezier(0.2, 0.9, 0.25, 1);
  --ease-stamp: cubic-bezier(0.34, 1.35, 0.64, 1);
  --dur-medium: 250ms;
  --dur-slow: 400ms;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: clip; /* clip (not hidden) keeps position:sticky working */
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink-primary);
  background-color: var(--surface-page);
  -webkit-font-smoothing: antialiased;
}
/* faint paper grain — kept whisper-quiet (over-texturing is a listed sin) */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}
main, header, footer { position: relative; z-index: 1; }
[hidden] { display: none !important; }
img { display: block; max-width: 100%; }
h1, h2, h3 { font-family: var(--font-display); color: var(--ink-primary); margin: 0; }
p { margin: 0; }
.mono { font-family: var(--font-mono); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

section { padding: var(--sp-16) var(--sp-5); }
.section-head { max-width: 720px; margin: 0 auto var(--sp-10); text-align: center; }
.kicker {
  font-size: 11px; font-weight: 600; letter-spacing: 0.8px;
  color: var(--ink-secondary); text-transform: uppercase;
  margin-bottom: var(--sp-3);
}
.section-title { font-size: clamp(28px, 4.4vw, 40px); font-weight: 700; line-height: 1.25; letter-spacing: -0.2px; }
.section-sub { margin-top: var(--sp-3); color: var(--ink-secondary); font-size: 18px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body); font-size: 15px; font-weight: 500;
  letter-spacing: 0.4px; text-decoration: none; cursor: pointer;
  border-radius: var(--radius-md);
  padding: 14px 24px; min-height: 48px;
  border: var(--bw-medium) solid transparent;
  transition: transform var(--dur-medium) var(--ease-decelerate-gravity),
              box-shadow var(--dur-medium) var(--ease-decelerate-gravity),
              background-color var(--dur-medium) var(--ease-decelerate-gravity);
}
.btn-primary {
  background: var(--control-primary-bg); color: var(--control-primary-ink);
  box-shadow: var(--shadow-card);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-raised); }
.btn-primary:active { transform: translateY(0); background: var(--control-primary-pressed); box-shadow: var(--shadow-pressed); }
.btn-secondary {
  background: transparent; color: var(--ink-900);
  border-color: var(--line-strong);
}
.btn-secondary:hover { background: var(--paper-300); }
.btn-sm { min-height: 40px; padding: 9px 16px; font-size: 13px; }
:focus-visible { outline: 2px solid var(--control-focus-ring); outline-offset: 2px; }

/* ---------- strata divider (motif: geological strata, 2–4 uneven bars, no gradients) ---------- */
.strata { display: flex; flex-direction: column; gap: 7px; padding: var(--sp-6) 0; }
.strata span { display: block; height: var(--h, 3px); width: var(--w, 100%); background: var(--c, var(--sandstone-400)); margin-inline: auto; }
.strata.mini { gap: 4px; padding: var(--sp-3) 0; }
.strata.flip span { max-width: 88%; }
.strata.flip span:nth-child(odd) { margin-left: auto; margin-right: 6%; }
.strata.flip span:nth-child(even) { margin-left: 6%; margin-right: auto; }

/* ---------- topbar ---------- */
.topbar {
  display: flex; align-items: center; gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-5);
  border-bottom: var(--bw-hairline) solid var(--line-hairline);
  background: rgba(247, 242, 232, 0.95); /* topbar-bg: paper-200 @95% */
  position: sticky; top: 0; z-index: 50;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.brand { display: flex; align-items: center; gap: var(--sp-2); text-decoration: none; }
.brand-mark { width: 26px; height: 26px; }
.brand-word { font-family: var(--font-display); font-weight: 700; font-size: 20px; color: var(--ink-900); }
.topbar-note { margin-left: auto; font-size: 11px; letter-spacing: 0.8px; color: var(--ink-tertiary); }

/* ---------- hero ---------- */
.hero { padding-top: var(--sp-12); overflow: hidden; }
.hero-inner {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr; gap: var(--sp-10);
  align-items: center;
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.8px; text-transform: uppercase; color: var(--ink-700);
  background: var(--paper-300); border: var(--bw-hairline) solid var(--line-hairline);
  border-radius: var(--radius-sm); padding: 6px 10px; margin-bottom: var(--sp-5);
}
.hero-title {
  font-size: clamp(38px, 7.2vw, 62px); font-weight: 700;
  line-height: 1.12; letter-spacing: -0.5px;
}
.hero-sub { margin-top: var(--sp-5); font-size: 19px; line-height: 1.6; color: var(--ink-600); max-width: 34em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: var(--sp-6); }
.hero-fine { margin-top: var(--sp-4); font-size: 11px; letter-spacing: 0.8px; color: var(--ink-tertiary); }

.hero-visual { position: relative; display: flex; justify-content: center; }
.contour-bg {
  position: absolute; inset: -10% -14%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cg fill='none' stroke='%232B2622' stroke-width='1'%3E%3Cpath d='M200 60c80-14 150 44 150 128s-70 138-150 128S50 268 50 190 120 74 200 60z'/%3E%3Cpath d='M200 100c58-10 108 32 108 92s-50 100-108 92-108-34-108-90 50-84 108-94z'/%3E%3Cpath d='M200 140c36-6 66 20 66 56s-30 62-66 56-66-22-66-56 30-50 66-56z'/%3E%3C/g%3E%3C/svg%3E");
  background-size: contain; background-position: center; background-repeat: no-repeat;
  opacity: 0.05;
}

/* ---------- SpecimenCard (DS §7.1 anatomy) ---------- */
.spec-card {
  position: relative;
  background: var(--surface-card);
  border: var(--bw-hairline) solid var(--line-hairline);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--sp-4);
}
.punch-hole {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--paper-300);
  box-shadow: var(--shadow-pressed), inset 0 0 0 1px var(--line-hairline);
}
.punch-lg { width: 14px; height: 14px; left: 22px; top: 22px; }
.spec-photo-wrap {
  position: relative; border-radius: var(--radius-md); overflow: hidden;
  background: var(--paper-300);
}
.spec-photo { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.spec-body { padding: var(--sp-3) var(--sp-1) 0; }
.spec-name { font-size: 22px; font-weight: 600; line-height: 1.3; }
.spec-latin { font-family: var(--font-display); font-style: italic; font-size: 13px; color: var(--ink-secondary); margin-top: 2px; }
.spec-idbar {
  display: flex; justify-content: space-between; gap: var(--sp-2);
  margin-top: var(--sp-3); padding: 8px 10px;
  background: var(--paper-300); border-radius: var(--radius-sm);
  border-top: var(--bw-hairline) solid var(--line-hairline);
  font-size: 11px; font-weight: 500; letter-spacing: 0.8px; color: var(--ink-700);
}

/* ConfidenceTag (DS §7.3): chamfered box = left color bar + diamond icon + word */
.conf-tag {
  position: absolute; top: 10px; right: 10px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 9px 5px 5px;
  font-family: var(--font-body); font-size: 13px; font-weight: 500; letter-spacing: 0.4px;
  clip-path: polygon(var(--chamfer-sm) 0, 100% 0, 100% calc(100% - var(--chamfer-sm)), calc(100% - var(--chamfer-sm)) 100%, 0 100%, 0 var(--chamfer-sm));
}
.conf-bar { width: 3px; align-self: stretch; border-radius: 1px; }
.conf-icon { width: 14px; height: 14px; flex: none; }
.conf-likely    { background: var(--malachite-100); color: var(--malachite-700); }
.conf-likely    .conf-bar { background: var(--malachite-500); }
.conf-possible  { background: var(--amber-100); color: var(--amber-700); }
.conf-possible  .conf-bar { background: var(--amber-400); }
.conf-suspected { background: #F2D7C6; color: var(--terracotta-700); }
.conf-suspected .conf-bar { background: var(--terracotta-400); }
.conf-uncertain { background: #E8E5DC; color: var(--rock-gray-700); }
.conf-uncertain .conf-bar { background: var(--rock-gray-400); }

/* StampBadge (DS §7.2): octagonal chamfer ring + mono text, stamped look */
.stamp {
  position: relative;
  width: 96px; height: 96px; flex: none;
  display: grid; place-items: center;
  transform: rotate(-10deg);
  clip-path: polygon(var(--chamfer-md) 0, calc(100% - var(--chamfer-md)) 0, 100% var(--chamfer-md), 100% calc(100% - var(--chamfer-md)), calc(100% - var(--chamfer-md)) 100%, var(--chamfer-md) 100%, 0 calc(100% - var(--chamfer-md)), 0 var(--chamfer-md));
}
.stamp::before { /* colored ink ring */
  content: ""; position: absolute; inset: 0; background: var(--stamp-ink, var(--badge-ink-common));
}
.stamp::after { /* paper center re-punched, leaving the ring */
  content: ""; position: absolute; inset: 5px; background: var(--paper-100);
  clip-path: polygon(calc(var(--chamfer-md) - 2px) 0, calc(100% - var(--chamfer-md) + 2px) 0, 100% calc(var(--chamfer-md) - 2px), 100% calc(100% - var(--chamfer-md) + 2px), calc(100% - var(--chamfer-md) + 2px) 100%, calc(var(--chamfer-md) - 2px) 100%, 0 calc(100% - var(--chamfer-md) + 2px), 0 calc(var(--chamfer-md) - 2px));
}
.stamp span {
  position: relative; z-index: 1;
  font-family: var(--font-mono); font-size: 10px; font-weight: 600;
  letter-spacing: 0.8px; line-height: 1.35; text-align: center;
  color: var(--stamp-ink, var(--badge-ink-common));
  opacity: 0.92;
}
.stamp-ink       { --stamp-ink: var(--badge-ink-common); }
.stamp-malachite { --stamp-ink: var(--malachite-500); }
.stamp-lapis     { --stamp-ink: var(--badge-ink-rare); }
.stamp-fluorite  { --stamp-ink: var(--badge-ink-epic); }
.stamp-sm { width: 72px; height: 72px; }
.stamp-sm span { font-size: 8.5px; }
.stamp-lg { width: 128px; height: 128px; }
.stamp-lg span { font-size: 13px; }

/* hero specimen card */
.hero-card { width: min(400px, 92%); transform: rotate(-2deg); }
.hero-card .spec-photo { aspect-ratio: 4 / 3.4; }
.hero-stamp { position: absolute; right: -16px; top: 34%; z-index: 3; }
.chip-hero { position: absolute; right: 2%; bottom: -8px; width: 74px; }
.chip-hero .chip-svg { width: 74px; height: auto; filter: drop-shadow(0 3px 5px rgba(43,38,34,0.25)); }

/* ---------- proof: detective case sheet ---------- */
.case-sheet { max-width: 760px; margin: 0 auto; padding: var(--sp-8) var(--sp-6) var(--sp-6); }
.case-row { padding: var(--sp-4) 0 var(--sp-5); border-bottom: var(--bw-hairline) solid var(--line-hairline); }
.case-row:first-of-type { padding-top: 0; }
.case-label { font-size: 11px; font-weight: 600; letter-spacing: 0.8px; color: var(--ink-tertiary); margin-bottom: var(--sp-3); }
.suspect { display: flex; align-items: center; gap: var(--sp-3); padding: 7px 0; flex-wrap: wrap; }
.suspect .conf-tag { position: static; }
.suspect-name { font-family: var(--font-display); font-weight: 600; font-size: 18px; }
.suspect-note { font-size: 12px; color: var(--ink-secondary); margin-left: auto; }
.evidence-chips { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.ev-chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; font-weight: 500; color: var(--malachite-700);
  background: var(--malachite-100); border-radius: 999px; padding: 8px 14px;
}
.ev-chip svg { width: 16px; height: 16px; }
.case-verdict { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); padding-top: var(--sp-5); flex-wrap: wrap; }
.verdict-line { font-family: var(--font-display); font-size: 19px; font-weight: 600; }
.verdict-line em { font-weight: 500; font-size: 16px; color: var(--ink-secondary); display: block; margin-top: 4px; }

/* ---------- proof: collection fan ---------- */
.card-fan {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--sp-4);
  max-width: 1080px; margin: 0 auto;
}
.fan-card { padding: var(--sp-3); }
.fan-card .spec-photo { aspect-ratio: 4 / 3; }
.fan-card .spec-name { font-size: 17px; }
.fan-card:nth-child(1) { transform: rotate(-1.5deg) translateY(6px); }
.fan-card:nth-child(2) { transform: rotate(1deg); }
.fan-card:nth-child(3) { transform: rotate(-0.8deg) translateY(10px); }
.fan-card:nth-child(4) { transform: rotate(1.6deg) translateY(2px); }
.fan-card:nth-child(5) { transform: rotate(-1.2deg) translateY(8px); }
.fan-card:nth-child(6) { transform: rotate(0.9deg) translateY(4px); }
.badge-row {
  max-width: 1080px; margin: var(--sp-8) auto 0;
  display: flex; align-items: center; justify-content: center; gap: var(--sp-5); flex-wrap: wrap;
}
.badge-caption { font-size: 14px; color: var(--ink-secondary); max-width: 260px; }

/* ---------- proof: education story demo ---------- */
.story-demo {
  max-width: 980px; margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 420px) 1fr; gap: var(--sp-8); align-items: center;
}
.story-card .spec-photo { aspect-ratio: 4 / 3; }
.story-hook { font-family: var(--font-display); font-style: italic; font-size: 17px; line-height: 1.5; color: var(--ink-700); margin-top: var(--sp-3); }
.story-layers { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sp-2); }
.story-layers li { font-size: 14.5px; color: var(--ink-600); display: flex; gap: var(--sp-3); align-items: baseline; }
.story-layers .mono { font-size: 11px; font-weight: 600; letter-spacing: 0.8px; color: var(--lapis-700); flex: none; }
.fact-chips { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-4); }
.fact-chip { font-size: 13px; font-weight: 500; color: var(--ink-700); background: var(--sandstone-100); border-radius: 999px; padding: 6px 12px; }
.story-aside { display: grid; gap: var(--sp-5); }
.aside-line { font-size: 17px; line-height: 1.6; color: var(--ink-600); padding-left: var(--sp-4); border-left: 3px solid var(--sandstone-400); }

/* ---------- how it works ---------- */
.how { padding-top: var(--sp-10); }
.steps {
  list-style: none; margin: 0 auto; padding: 0;
  max-width: 1080px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-6);
  counter-reset: step;
}
.step { position: relative; padding-left: 0; }
.step-num {
  display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 0.8px;
  color: var(--ink-tertiary); border: var(--bw-hairline) solid var(--line-hairline);
  border-radius: var(--radius-sm); padding: 3px 8px; margin-bottom: var(--sp-3);
}
.step-icon { width: 64px; height: 64px; display: block; margin-bottom: var(--sp-3); }
.step-title { font-size: 21px; font-weight: 600; margin-bottom: var(--sp-2); }
.step-text { font-size: 15.5px; line-height: 1.55; color: var(--ink-secondary); max-width: 32em; }

/* ---------- product peek: pure-CSS phone ---------- */
.peek { padding-top: var(--sp-10); }
.peek-inner {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr; gap: var(--sp-10); align-items: center;
}
.phone-wrap { position: relative; display: flex; justify-content: center; }
.phone {
  width: min(320px, 84vw); border-radius: 42px; padding: 10px;
  background: var(--ink-950);
  box-shadow: var(--shadow-float);
}
.phone-screen {
  border-radius: 34px; background: var(--surface-page); overflow: hidden;
  height: 600px; display: flex; flex-direction: column; position: relative;
}
.app-topbar {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 10px; letter-spacing: 0.8px; color: var(--ink-700);
  padding: 10px 14px 8px; border-bottom: var(--bw-hairline) solid var(--line-hairline);
  background: rgba(247,242,232,0.95);
}
.mini-card { margin: var(--sp-3); padding: var(--sp-3); }
.mini-card .spec-photo { aspect-ratio: 4 / 2.4; }
.mini-card .spec-name { font-size: 18px; }
.mini-card .spec-body { padding-top: var(--sp-2); }
.mini-card .spec-idbar { margin-top: var(--sp-2); }
.mini-card .punch-hole { top: 10px; left: 10px; }
.det-sheet {
  margin-top: auto;
  background: var(--surface-card);
  border-top: var(--bw-hairline) solid var(--line-hairline);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: 0 -4px 12px rgba(43,38,34,0.10);
  padding: var(--sp-4) var(--sp-4) var(--sp-3);
}
.det-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--sp-3); }
.det-title { font-family: var(--font-display); font-weight: 600; font-size: 16px; }
.det-dots { display: inline-flex; align-items: center; gap: 5px; font-size: 10px; color: var(--ink-secondary); }
.det-dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--paper-500); }
.det-dots i.on { background: var(--ink-700); }
.det-q { font-size: 14.5px; font-weight: 500; line-height: 1.45; margin-bottom: var(--sp-3); }
.det-options { display: grid; gap: var(--sp-2); }
.det-opt {
  font: inherit; font-size: 14px; font-weight: 500; text-align: left;
  padding: 10px 14px; border-radius: var(--radius-md);
  border: var(--bw-medium) solid var(--line-hairline); background: var(--paper-100);
  color: var(--ink-900);
}
.det-opt.sel { background: var(--selection-bg); border-color: var(--selection-border); }
.det-safety {
  display: flex; align-items: center; gap: 8px;
  margin-top: var(--sp-3); padding: 8px 10px; border-radius: var(--radius-sm);
  background: var(--feedback-warning-surface); color: var(--feedback-warning-ink);
  font-size: 12.5px; font-weight: 500;
}
.det-safety svg { width: 15px; height: 15px; flex: none; }
.chip-bubble {
  position: absolute; right: max(-4px, 2%); top: 8%;
  display: flex; align-items: flex-start; gap: var(--sp-2);
  width: 190px;
}
.chip-svg-sm { width: 46px; height: auto; flex: none; }
.chip-say {
  font-family: var(--font-mascot); font-size: 13.5px; font-weight: 500; line-height: 1.45;
  background: var(--paper-100); border: var(--bw-hairline) solid var(--line-hairline);
  border-radius: var(--radius-lg); border-top-left-radius: 2px;
  padding: 8px 11px; box-shadow: var(--shadow-card); color: var(--ink-700);
}
.peek-copy .kicker { margin-bottom: var(--sp-3); }
.peek-copy .section-title { text-align: left; }
.peek-list { list-style: none; margin: var(--sp-6) 0 0; padding: 0; display: grid; gap: var(--sp-4); }
.peek-list li { font-size: 16px; color: var(--ink-secondary); padding-left: var(--sp-5); position: relative; }
.peek-list li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 9px; height: 9px; background: var(--fluorite-500);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}
.peek-list strong { color: var(--ink-900); font-weight: 600; }

/* ---------- parents / trust ---------- */
.parents { padding-top: var(--sp-10); }
.trust-grid {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr; gap: var(--sp-4);
}
.trust-card {
  background: var(--surface-card); border: var(--bw-hairline) solid var(--line-hairline);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-card);
  padding: var(--sp-5);
}
.trust-icon { width: 40px; height: 40px; color: var(--ink-700); margin-bottom: var(--sp-3); }
.trust-card h3 { font-size: 19px; font-weight: 600; margin-bottom: var(--sp-2); }
.trust-card p { font-size: 15px; line-height: 1.55; color: var(--ink-secondary); }
.trust-strip {
  max-width: 1080px; margin: var(--sp-8) auto 0; text-align: center;
  font-size: 11px; font-weight: 600; letter-spacing: 0.8px; color: var(--ink-tertiary);
  border-top: var(--bw-hairline) solid var(--line-hairline); padding-top: var(--sp-5);
}

/* ---------- waitlist ---------- */
.waitlist { padding-bottom: var(--sp-16); }
.waitlist-card {
  max-width: 620px; margin: 0 auto; text-align: center;
  padding: var(--sp-10) var(--sp-6);
}
.waitlist-card .kicker { margin-bottom: var(--sp-3); }
.wl-form {
  display: flex; gap: var(--sp-3); margin-top: var(--sp-8);
  flex-direction: column;
}
.wl-input {
  flex: 1; font: inherit; font-size: 16px;
  padding: 14px 16px; min-height: 52px;
  color: var(--ink-primary);
  background: var(--surface-sunken);
  border: var(--bw-thin) solid var(--line-hairline);
  border-radius: var(--radius-md);
}
.wl-input:focus { outline: none; border-color: var(--control-focus-ring); box-shadow: 0 0 0 2px var(--lapis-100); }
.wl-input::placeholder { color: var(--ink-400); }
.wl-fine { margin-top: var(--sp-4); font-size: 13px; color: var(--ink-tertiary); line-height: 1.5; }
.wl-error {
  margin-top: var(--sp-3); font-size: 13.5px; font-weight: 500;
  color: var(--feedback-error-ink); background: var(--feedback-error-surface);
  border-radius: var(--radius-sm); padding: 8px 12px;
}
.wl-success { margin-top: var(--sp-6); display: grid; justify-items: center; gap: var(--sp-3); }
.wl-success[hidden] { display: none; }
.wl-success-line { font-family: var(--font-display); font-size: 21px; font-weight: 600; }
.wl-conf-no { font-size: 13px; font-weight: 600; letter-spacing: 0.8px; color: var(--ink-700); background: var(--paper-300); border-radius: var(--radius-sm); padding: 6px 12px; }
/* stamp drop (DS §6.3-① condensed: fall → rest → settle) */
.stamp.stamp-in { animation: stampDrop 550ms var(--ease-stamp) both; }
@keyframes stampDrop {
  0%   { transform: rotate(-10deg) scale(1.4) translateY(-10px); opacity: 0; }
  45%  { transform: rotate(-10deg) scale(1.0) translateY(0); opacity: 1; }
  70%  { transform: rotate(-10deg) scale(1.02); }
  100% { transform: rotate(-10deg) scale(1.0); opacity: 0.94; }
}

/* ---------- footer ---------- */
.footer { padding-bottom: var(--sp-8); }
.footer-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 var(--sp-5);
  display: flex; flex-direction: column; gap: var(--sp-5);
}
.footer-brand { display: flex; align-items: center; gap: var(--sp-3); }
.footer-word { font-family: var(--font-display); font-weight: 700; font-size: 18px; }
.footer-tag { font-size: 13px; color: var(--ink-secondary); }
.footer-meta { font-size: 10.5px; letter-spacing: 0.8px; color: var(--ink-tertiary); display: grid; gap: 6px; }
.footer-meta a { color: var(--ink-500); text-decoration: underline; text-underline-offset: 2px; }
.footer-meta a:hover { color: var(--ink-900); }
.footer-meta a[aria-current] { color: var(--ink-900); font-weight: 600; text-decoration: none; }

/* ---------- reveal on scroll (strata-settle feel, gravity easing) ---------- */
.reveal { opacity: 0; transform: translateY(16px); }
.reveal.in { opacity: 1; transform: none; transition: opacity var(--dur-slow) var(--ease-decelerate-gravity), transform var(--dur-slow) var(--ease-decelerate-gravity); }
.reveal.d1.in { transition-delay: 70ms; }
.reveal.d2.in { transition-delay: 140ms; }
.reveal.d3.in { transition-delay: 210ms; }

/* ---------- breakpoints ---------- */
@media (min-width: 620px) {
  .wl-form { flex-direction: row; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .hero-inner { grid-template-columns: 1.05fr 0.95fr; }
  .peek-inner { grid-template-columns: 0.9fr 1.1fr; }
  .peek-copy { order: 2; }
  .steps { grid-template-columns: repeat(4, 1fr); }
  .trust-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 899px) {
  .story-demo { grid-template-columns: 1fr; }
  .story-card { max-width: 460px; margin: 0 auto; }
  .card-fan {
    display: flex; overflow-x: auto; gap: var(--sp-4);
    padding: var(--sp-2) var(--sp-1) var(--sp-5);
    scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
  }
  .fan-card { flex: 0 0 240px; scroll-snap-align: center; }
  .topbar-note { display: none; }
}
@media (max-width: 480px) {
  .hero-cta .btn { width: 100%; }
  .chip-bubble { top: auto; bottom: 78%; right: 0; width: 170px; }
  .case-verdict { justify-content: center; text-align: center; }
  .suspect-note { margin-left: 0; width: 100%; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .stamp.stamp-in { animation: none; opacity: 0.94; }
  .btn, .btn-primary { transition: none; }
}