/* ============================================================
   NGF · Mother's Day Preview
   A presentation deck for showing the deliverables to NGF.
   Vertical scroll-snap. Each section fills the viewport.
   No half-seen things. BCA Light aesthetic.
   ============================================================ */

:root {
  --paper:        #f5f1e8;
  --paper-2:      #efeadb;
  --paper-3:      #ffffff;
  --paper-warm:   #faf6ec;
  --ink:          #0a0a0a;
  --ink-2:        #1a1a1f;
  --ink-soft:     rgba(10,10,10,0.78);
  --ink-mute:     rgba(10,10,10,0.55);
  --ink-quiet:    rgba(10,10,10,0.38);

  --gold:         #a8803c;
  --gold-2:       #c9a875;
  --gold-3:       #82612d;
  --gold-glow:    rgba(168,128,60,0.16);
  --gold-glow-2:  rgba(168,128,60,0.30);
  --gold-line:    rgba(168,128,60,0.32);
  --gold-bg:      rgba(168,128,60,0.10);

  --velvet:       #8b0e2c;
  --velvet-soft:  rgba(139,14,44,0.10);
  --velvet-line:  rgba(139,14,44,0.32);

  --green:        #486847;
  --green-soft:   rgba(72,104,71,0.14);
  --green-line:   rgba(72,104,71,0.35);

  --line:         rgba(10,10,10,0.10);
  --line-strong:  rgba(10,10,10,0.20);

  --serif:        'Fraunces', Georgia, serif;
  --sans:         'Inter', system-ui, -apple-system, Segoe UI, sans-serif;
  --mono:         'JetBrains Mono', ui-monospace, monospace;

  --ease:         cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring:  cubic-bezier(0.34, 1.56, 0.64, 1);

  --shadow-soft:  0 4px 18px rgba(10,10,10,0.06);
  --shadow-mid:   0 12px 36px rgba(10,10,10,0.10);
  --shadow-strong:0 24px 56px rgba(10,10,10,0.18);

  --topbar-h:     48px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html { scroll-behavior: smooth; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ───── TOPBAR ───── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 28px;
  background: rgba(245,241,232,0.85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  height: var(--topbar-h);
}
.topbar__brand { display: flex; align-items: baseline; gap: 10px; }
.topbar__wordmark { font-weight: 800; letter-spacing: 0.18em; font-size: 11.5px; text-transform: uppercase; }
.topbar__divider { color: var(--gold); }
.topbar__client {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.topbar__chip {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  font-weight: 500;
  text-transform: uppercase;
}

/* ───── SIDE DOT NAV ───── */
.dotnav {
  position: fixed;
  top: 50%; right: 24px;
  transform: translateY(-50%);
  z-index: 40;
  display: flex; flex-direction: column; gap: 10px;
}
.dotnav__dot {
  appearance: none; -webkit-appearance: none;
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 1px solid var(--ink-quiet);
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all .25s var(--ease);
  padding: 0;
}
.dotnav__dot:hover {
  border-color: var(--gold);
  transform: scale(1.2);
}
.dotnav__dot.is-active {
  background: var(--gold);
  border-color: var(--gold);
  transform: scale(1.4);
  box-shadow: 0 0 14px -2px var(--gold-glow-2);
}
.dotnav__dot::after {
  content: attr(data-label);
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(4px);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.dotnav__dot:hover::after,
.dotnav__dot.is-active::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* ============================================================
   DECK — vertical scroll-snap, each section fills viewport
   ============================================================ */
.deck {
  height: 100dvh;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.deck::-webkit-scrollbar { display: none; }

.section {
  height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: calc(var(--topbar-h) + 24px) 36px 36px;
  position: relative;
  overflow: hidden;
}

/* shared section heading */
.section__head {
  display: flex; flex-direction: column; gap: 12px;
  max-width: 800px;
}
.section__eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
  font-weight: 500;
  text-transform: uppercase;
}
.section__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.022em;
  margin: 0;
  color: var(--ink);
}
.section__title em { font-style: italic; color: var(--gold); font-weight: 400; }
.section__sub {
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0;
}
.section__sub em { font-style: italic; color: var(--gold); font-weight: 500; }

/* ============================================================
   SECTION 1 · COVER
   ============================================================ */
.section--cover { background: var(--paper); }
.cover {
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: 100%;
  max-width: 1320px;
  gap: 24px;
}
.cover__topline {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.cover__logo {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--gold-2) 0%, var(--gold) 60%, var(--gold-3) 100%);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 32px -8px var(--gold-glow-2), 0 0 0 1px rgba(255,255,255,0.4) inset;
}
.cover__logo-mark {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 32px;
  color: var(--paper);
  line-height: 1;
}
.cover__chip {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  font-weight: 500;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-2);
}
.cover__center {
  display: flex; flex-direction: column; justify-content: center;
  gap: 22px;
  max-width: 1100px;
}
.cover__eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
  font-weight: 500;
  padding: 8px 14px;
  border: 1px solid var(--gold-line);
  border-radius: 999px;
  background: var(--gold-bg);
  align-self: flex-start;
}
.cover__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(4rem, 11vw, 9.5rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--ink);
}
.cover__title em { font-style: italic; color: var(--gold); font-weight: 400; }
.cover__sub {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.4;
  color: var(--ink-soft);
  margin: 0;
  max-width: 760px;
  letter-spacing: -0.01em;
}
.cover__sub em { font-style: italic; color: var(--gold); font-weight: 500; }
.cover__foot {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 20px;
  padding-bottom: 4px;
}
.cover__credit {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--ink-quiet);
  text-transform: uppercase;
  font-weight: 500;
}
.scroll-cue {
  appearance: none; -webkit-appearance: none;
  display: flex; align-items: center; gap: 10px;
  padding: 11px 18px;
  border: 1px solid var(--gold-line);
  border-radius: 999px;
  background: var(--paper-3);
  color: var(--gold);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  cursor: pointer;
  transition: all .25s var(--ease);
  box-shadow: var(--shadow-soft);
}
.scroll-cue:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--paper);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -8px var(--gold-glow-2);
}
.scroll-cue__arrow {
  font-size: 14px;
  animation: bob 2.2s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(3px); }
}

/* ============================================================
   SECTION 2 · INSIDE
   ============================================================ */
.section--inside { background: var(--paper-warm); }
.inside {
  width: 100%;
  max-width: 1280px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 36px;
}
.inside__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  align-self: center;
}
.inside__stat {
  background: var(--paper-3);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 32px 28px;
  display: flex; flex-direction: column; gap: 12px;
  box-shadow: var(--shadow-soft);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.inside__stat:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-mid);
}
.inside__stat-num {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(3.5rem, 7vw, 5.5rem);
  line-height: 0.95;
  color: var(--gold);
  letter-spacing: -0.03em;
}
.inside__stat-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
  line-height: 1.4;
}
.inside__toc {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}
.toc-item {
  appearance: none; -webkit-appearance: none;
  display: flex; flex-direction: column; gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-3);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: all .25s var(--ease);
  font-family: inherit;
}
.toc-item:hover {
  border-color: var(--gold-line);
  background: var(--gold-bg);
  transform: translateY(-1px);
}
.toc-item__num {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
  font-weight: 500;
}
.toc-item__name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.01em;
}

/* ============================================================
   SECTIONS 3-8 · CONCEPTS
   ============================================================ */
.section--concept {
  /* alternate light bg for rhythm */
}
.section--concept:nth-of-type(even) { background: var(--paper-warm); }

.concept {
  width: 100%;
  max-width: 1320px;
  display: grid;
  grid-template-columns: 1fr minmax(360px, 480px);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}

.concept__copy {
  display: flex; flex-direction: column; gap: 18px;
  min-width: 0;
}
.concept__counter {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
  font-weight: 500;
}
.concept__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.6rem, 5.4vw, 4.6rem);
  line-height: 1;
  letter-spacing: -0.025em;
  margin: 0;
  color: var(--ink);
}
.concept__title em { font-style: italic; color: var(--gold); font-weight: 400; }
.concept__tagline {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--gold-3);
  margin: 0;
}
.concept__desc {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0;
  max-width: 560px;
}

.concept__iter-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  text-transform: uppercase;
  font-weight: 500;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  margin-top: 8px;
}
.concept__iters {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-width: 460px;
}
.concept__iter {
  appearance: none; -webkit-appearance: none;
  border: 1px solid var(--line);
  background: var(--paper-warm);
  padding: 0;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  text-align: left;
  display: flex; flex-direction: column;
  transition: all .25s var(--ease);
  font-family: inherit;
  color: inherit;
}
.concept__iter:hover { border-color: var(--gold-line); transform: translateY(-2px); }
.concept__iter.is-active {
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold), 0 6px 18px -6px var(--gold-glow-2);
}
.concept__iter-media {
  aspect-ratio: 1 / 1;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.concept__iter-tag {
  position: absolute;
  top: 5px; left: 5px;
  padding: 2px 5px;
  background: rgba(0,0,0,0.65);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.06em;
  color: #fff;
  font-weight: 500;
}
.concept__iter-bigtype {
  font-family: var(--serif);
  font-weight: 500;
  color: #fff;
  font-size: clamp(0.7rem, 1vw, 0.85rem);
  line-height: 1;
  text-align: center;
  padding: 4px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
}
.concept__iter-bigtype em { font-style: italic; color: var(--gold-2); font-weight: 400; }
.concept__iter-name {
  font-size: 9.5px;
  color: var(--ink-soft);
  padding: 5px 7px;
  background: var(--paper-3);
  border-top: 1px solid var(--line);
  line-height: 1.2;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 30px;
}

/* ad preview */
.concept__preview {
  display: flex; flex-direction: column; gap: 12px;
  align-items: center;
}
.preview-caption {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
  font-weight: 500;
  align-self: flex-start;
}

/* ───── AD ───── */
.ad {
  width: 100%;
  max-width: 460px;
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  color: #050505;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 13px;
  box-shadow:
    0 0 0 1px var(--gold-line),
    0 32px 72px -20px rgba(10,10,10,0.20),
    0 0 80px -24px var(--gold-glow);
}
.ad__chrome {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px 8px;
}
.ad__avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-2) 0%, var(--gold) 60%, var(--gold-3) 100%);
  color: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  line-height: 1;
}
.ad__meta { line-height: 1.2; }
.ad__name { font-weight: 600; font-size: 13px; color: #050505; }
.ad__check { color: #1877f2; font-size: 11px; }
.ad__sub { font-size: 11px; color: #65676b; margin-top: 1px; }
.ad__primary {
  margin: 0;
  padding: 4px 12px 10px;
  font-size: 13px;
  line-height: 1.4;
  color: #050505;
  white-space: pre-line;
}
.ad__media {
  aspect-ratio: 1 / 1;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  container-type: inline-size;
}
.ad__tag {
  position: absolute;
  top: 12px; left: 12px;
  padding: 4px 9px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  font-weight: 500;
}
.ad__bigtype {
  font-family: var(--serif);
  font-weight: 500;
  color: #fff;
  font-size: clamp(2rem, 13cqw, 4.4rem);
  line-height: 1;
  text-align: center;
  padding: 18px;
  text-shadow: 0 6px 28px rgba(0,0,0,0.55);
}
.ad__bigtype em { font-style: italic; color: var(--gold-2); font-weight: 400; }
.ad__bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px;
  background: #f0f2f5;
  gap: 10px;
}
.ad__cta { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; flex: 1; }
.ad__domain { font-size: 10.5px; color: #65676b; text-transform: uppercase; letter-spacing: 0.04em; }
.ad__headline { font-size: 13px; font-weight: 600; color: #050505; line-height: 1.25; margin-top: 1px; }
.ad__cta-btn {
  background: #e4e6eb;
  color: #050505;
  border: none;
  padding: 8px 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 12px;
  white-space: nowrap;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

/* ============================================================
   SECTION 9 · TEXT STRATEGY
   ============================================================ */
.section--text { background: var(--paper-warm); }
.text-strat {
  width: 100%;
  max-width: 1280px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 32px;
}
.angles {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  align-items: stretch;
}
.angle-card {
  background: var(--paper-3);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 20px;
  display: flex; flex-direction: column; gap: 10px;
  box-shadow: var(--shadow-soft);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.angle-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold-line);
  box-shadow: var(--shadow-mid);
}
.angle-card__letter {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.6rem, 4vw, 3.4rem);
  line-height: 1;
  color: var(--gold);
  margin-bottom: 4px;
}
.angle-card__name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 17px;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.angle-card__desc {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
  flex: 1;
}
.angle-card__count {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
  text-transform: uppercase;
  font-weight: 500;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  margin-top: auto;
}

/* ============================================================
   SECTION 10 · APPROVAL
   ============================================================ */
.section--approve { background: var(--paper); }
.approve {
  width: 100%;
  max-width: 980px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 32px;
  text-align: center;
  align-content: center;
}
.section--approve .section__head { align-items: center; margin: 0 auto; text-align: center; }
.section--approve .section__sub { text-align: center; }

.approve__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-self: center;
}
.approve__btn {
  display: flex; flex-direction: column; gap: 6px; align-items: center;
  padding: 32px 28px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--paper-3);
  text-decoration: none;
  cursor: pointer;
  transition: all .25s var(--ease);
  box-shadow: var(--shadow-soft);
}
.approve__btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-mid);
}
.approve__btn--yes {
  border-color: var(--green-line);
  background: var(--green-soft);
}
.approve__btn--yes:hover {
  background: rgba(72,104,71,0.20);
  box-shadow: 0 16px 40px -10px rgba(72,104,71,0.45);
}
.approve__btn--no {
  border-color: var(--velvet-line);
  background: var(--velvet-soft);
}
.approve__btn--no:hover {
  background: rgba(139,14,44,0.16);
  box-shadow: 0 16px 40px -10px rgba(139,14,44,0.45);
}
.approve__btn-eyebrow {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  color: inherit;
}
.approve__btn--yes .approve__btn-eyebrow,
.approve__btn--yes .approve__btn-text { color: var(--green); }
.approve__btn--no .approve__btn-eyebrow,
.approve__btn--no .approve__btn-text { color: var(--velvet); }
.approve__btn-text {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1;
  letter-spacing: -0.018em;
}
.approve__btn-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  text-transform: uppercase;
  font-weight: 500;
  margin-top: 4px;
}

.approve__foot {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ink-quiet);
  text-transform: uppercase;
  font-weight: 500;
}

/* ============================================================
   ENTRANCE ANIMATIONS — driven by IntersectionObserver
   ============================================================ */
.is-revealing > * {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}
.is-visible > *:nth-child(2) { transition-delay: .08s; }
.is-visible > *:nth-child(3) { transition-delay: .16s; }
.is-visible > *:nth-child(4) { transition-delay: .24s; }
.is-visible > *:nth-child(5) { transition-delay: .32s; }
.is-visible > *:nth-child(6) { transition-delay: .40s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1080px) {
  .section { padding: calc(var(--topbar-h) + 18px) 22px 22px; }
  .concept { grid-template-columns: 1fr minmax(300px, 400px); gap: 28px; }
  .inside__toc { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  /* Mobile: keep snap, but stack concept content */
  .section { height: auto; min-height: 100dvh; padding: calc(var(--topbar-h) + 18px) 18px 28px; }
  .concept {
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 480px;
    margin: 0 auto;
  }
  .concept__iters { max-width: 100%; }
  .inside__grid { grid-template-columns: 1fr; gap: 12px; }
  .inside__stat { padding: 22px 20px; flex-direction: row; align-items: center; gap: 18px; }
  .inside__stat-num { font-size: 3rem; }
  .angles { grid-template-columns: 1fr 1fr; }
  .approve__actions { grid-template-columns: 1fr; }
  .dotnav { display: none; }
  .topbar { padding: 10px 18px; }
  .cover__topline { flex-wrap: wrap; }
  .cover__foot { flex-direction: column; align-items: flex-start; gap: 14px; }
}

@media (max-width: 520px) {
  .cover__title { font-size: clamp(3rem, 14vw, 5rem); }
  .approve__foot { flex-direction: column; gap: 8px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .is-revealing > * { opacity: 1; transform: none; }
}