/* =========================================================================
   AI Index Report 2026 · styles.css
   Editorial / premium-minimalist aesthetic on a zero-build static stack.
   Warm monochrome canvas · serif headlines (Newsreader) · mono numerals
   (JetBrains Mono) · flat 1px-border cards · a single clay accent.
   MD3 token NAMES are kept so the component CSS stays portable; the VALUES
   are remapped to the editorial palette.
   ========================================================================= */

/* ---- Tokens : LIGHT (warm bone + clay accent) ---- */
:root,
[data-theme="light"] {
  --primary:               #8C3A2E;   /* clay — the one accent */
  --on-primary:            #FFFFFF;
  --primary-container:     #F2E4DF;   /* pale clay */
  --on-primary-container:  #5A241B;
  --secondary:             #6F6B63;
  --secondary-container:   #ECEAE4;
  --on-secondary-container:#2A2722;
  --tertiary:              #4F6B5C;   /* muted sage, used very sparingly */
  --tertiary-container:    #E7EDE8;

  --background:            #FBFBFA;   /* warm off-white canvas */
  --on-background:         #1A1815;
  --surface:              #FFFFFF;
  --surface-container:     #FFFFFF;   /* cards = white */
  --surface-container-high:#F4F3F0;   /* dialog / hover fill */
  --surface-variant:       #F1EFEA;   /* tag / chip fill */
  --on-surface:            #1A1815;   /* warm charcoal, never pure black */
  --on-surface-variant:    #6F6B63;   /* muted warm gray */

  --outline:               #B9B4AB;
  --outline-variant:       #E7E4DE;   /* the 1px hairline rule */
  --error:                 #9F2F2D;
  --shadow:                rgba(26,22,12,.06);

  /* ultra-diffuse, low-opacity shadows (minimalist: < 0.06) */
  --elev-1: 0 1px 2px rgba(26,22,12,.04);
  --elev-2: 0 2px 10px rgba(26,22,12,.05);
  --elev-3: 0 12px 40px rgba(26,22,12,.12);

  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;

  --font-body:  "Manrope", "Noto Sans TC", system-ui, -apple-system, sans-serif;
  --font-serif: "Newsreader", "Noto Serif TC", Georgia, "Songti TC", serif;
  --font-mono:  "JetBrains Mono", "Noto Sans TC", ui-monospace, "SF Mono", monospace;
}

/* ---- Tokens : DARK (warm charcoal + light clay) ---- */
[data-theme="dark"] {
  --primary:               #E3A593;   /* light clay */
  --on-primary:            #3A1610;
  --primary-container:     #4A241B;
  --on-primary-container:  #F6E7E1;
  --secondary:             #A8A296;
  --secondary-container:   #2A2620;
  --on-secondary-container:#ECE7DD;
  --tertiary:              #8FB3A0;
  --tertiary-container:    #2A332C;

  --background:            #15130F;
  --on-background:         #ECE7DD;
  --surface:              #1A1813;
  --surface-container:     #1C1A15;
  --surface-container-high:#26231D;
  --surface-variant:       #2A2620;
  --on-surface:            #ECE7DD;
  --on-surface-variant:    #A8A296;

  --outline:               #6E685D;
  --outline-variant:       #322E27;
  --error:                 #E9938B;
  --shadow:                rgba(0,0,0,.5);

  --elev-1: 0 1px 2px rgba(0,0,0,.30);
  --elev-2: 0 2px 12px rgba(0,0,0,.40);
  --elev-3: 0 16px 48px rgba(0,0,0,.55);
}

/* ---- Reset / base ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background: var(--background);
  color: var(--on-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .25s, color .25s;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
.material-symbols-rounded {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  line-height: 1;
  user-select: none;
}
::selection { background: var(--primary-container); color: var(--on-primary-container); }

/* ---- App bar ---- */
.appbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter: saturate(120%) blur(10px);
  border-bottom: 1px solid var(--outline-variant);
}
.appbar__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -.01em;
  color: var(--on-surface);
  min-width: 0;
  overflow: hidden;
}
.brand__logo { color: var(--primary); flex: 0 0 auto; font-size: 22px; }
.brand__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.appbar__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

/* link pills in the appbar (source link + internal page nav) */
.src-link,
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  transition: color .15s, border-color .15s, background .15s;
}
.src-link:hover,
.nav-link:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-container); }
.src-link .material-symbols-rounded,
.nav-link .material-symbols-rounded { font-size: 17px; }
/* internal page nav reads as the primary cross-page link */
.nav-link { color: var(--on-surface); border-color: var(--outline); }

/* Chapters dropdown menu (injected by app.js) */
.ch-menu { position: relative; display: inline-flex; }
.ch-menu__btn { cursor: pointer; font: inherit; background: transparent; }
.ch-menu__caret { font-size: 18px; margin-left: -2px; transition: transform .2s; }
.ch-menu--open .ch-menu__caret { transform: rotate(180deg); }
.ch-menu--open.ch-menu .ch-menu__btn { color: var(--primary); border-color: var(--primary); }
.ch-menu__panel {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 232px;
  max-width: min(290px, calc(100vw - 24px));
  max-height: 72vh;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  box-shadow: var(--elev-3);
  padding: 6px;
  z-index: 40;
  flex-direction: column;
  gap: 2px;
}
.ch-menu--open .ch-menu__panel { display: flex; }
.ch-menu__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--on-surface);
  font-size: .9rem;
  font-weight: 600;
  transition: background .12s, color .12s;
}
.ch-menu__item:hover { background: var(--surface-container-high); color: var(--primary); }
.ch-menu__item--active { background: var(--primary-container); color: var(--on-primary-container); }
.ch-menu__num {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  color: var(--on-surface-variant);
  min-width: 1.3em;
  text-align: center;
}
.ch-menu__item:hover .ch-menu__num { color: var(--primary); }
.ch-menu__item--active .ch-menu__num { color: var(--on-primary-container); }

/* GitHub star button (injected by app.js) */
.gh-star {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 11px;
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 600;
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  transition: color .15s, border-color .15s, background .15s;
}
.gh-star:hover { border-color: var(--primary); background: var(--primary-container); }
.gh-star__logo { flex: 0 0 auto; color: var(--on-surface); }
.gh-star:hover .gh-star__logo { color: var(--on-primary-container); }
.gh-star__icon { font-size: 17px; color: #E0A33B; }   /* star gold */
.gh-star__count { font-variant-numeric: tabular-nums; min-width: .5ch; }
.gh-star:hover .gh-star__count { color: var(--on-primary-container); }

/* ---- Icon button ---- */
.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--on-surface-variant);
  border-radius: var(--radius-sm);
  padding: 8px 9px;
  cursor: pointer;
  font: inherit;
  transition: background .15s, color .15s;
}
.icon-btn:hover { background: var(--surface-container-high); color: var(--on-surface); }
.icon-btn__txt { font-size: .82rem; font-weight: 600; font-family: var(--font-mono); }

/* ---- Sticky section nav (scrollspy) ---- */
.sectionnav {
  position: sticky;
  top: 57px;
  z-index: 25;
  background: color-mix(in srgb, var(--background) 86%, transparent);
  backdrop-filter: saturate(120%) blur(10px);
  border-bottom: 1px solid var(--outline-variant);
}
.sectionnav__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 9px 20px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
.sectionnav__inner::-webkit-scrollbar { display: none; }
.navpill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 6px 13px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
  background: transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.navpill .material-symbols-rounded { font-size: 17px; }
.navpill:hover { color: var(--on-surface); border-color: var(--outline); }
.navpill--active {
  background: var(--primary-container);
  color: var(--on-primary-container);
  border-color: transparent;
}

/* ---- Section scaffolding ---- */
.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 76px 24px 12px;
  scroll-margin-top: 116px;
}
.section-head { margin-bottom: 28px; max-width: 64ch; }
.section-head::before {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  margin-bottom: 20px;
}
.section-head h2 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3.4vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.12;
  color: var(--on-surface);
}
.section-head__sub {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--on-surface-variant);
}

/* ---- HERO ---- */
.section--hero {
  position: relative;
  padding-top: 64px;
}
.section--hero::before {
  content: "";
  position: absolute;
  inset: -10px 0 auto 0;
  height: 360px;
  background: radial-gradient(58% 80% at 28% 0%,
              color-mix(in srgb, var(--primary) 13%, transparent), transparent 72%);
  opacity: .6;
  pointer-events: none;
  z-index: 0;
}
.section--hero > * { position: relative; z-index: 1; }
.section--hero .section-head { max-width: none; }
.section--hero .section-head h2 {
  max-width: 16em;                  /* measure scales with the heading's own size, not the parent */
  font-size: clamp(2.1rem, 5.6vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -.025em;
  line-height: 1.06;
}
.section--hero .section-head__sub { max-width: 62ch; font-size: 1.05rem; }
.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(165px, 1fr));
  gap: 1px;                         /* hairline-separated bento grid */
  margin-top: 28px;
  background: var(--outline-variant);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  overflow: hidden;
}
.hero__stat {
  background: var(--surface);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hero__stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.03em;
  line-height: 1;
}
.hero__stat-label {
  font-size: .82rem;
  line-height: 1.45;
  color: var(--on-surface-variant);
}

/* ---- CARDS grid ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  position: relative;
  background: var(--surface-container);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  border: 1px solid var(--outline-variant);
  transition: box-shadow .2s, transform .2s, border-color .2s;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.card:hover,
.card:focus-visible {
  box-shadow: var(--elev-2);
  transform: translateY(-2px);
  border-color: var(--outline);
  outline: none;
}
.card__title {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--on-surface);
}
.card__summary {
  margin: 0;
  font-size: .9rem;
  line-height: 1.55;
  color: var(--on-surface-variant);
}
.card__tags {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 4px;
}
.tag {
  font-family: var(--font-mono);
  font-size: .64rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
  background: var(--surface-variant);
  padding: 3px 9px;
  border-radius: 999px;
}

/* numbered takeaways (01–15) — pure CSS counter, The-Pudding-style metadata */
#takeaways .grid { counter-reset: tk; }
#takeaways .card { counter-increment: tk; }
#takeaways .card::before {
  content: counter(tk, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--primary);
}

/* ---- TIMELINE (kept for completeness) ---- */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px;
  width: 1px; background: var(--outline-variant);
}
.tl-item { position: relative; padding: 0 0 18px 36px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute; left: 0; top: 6px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--background);
  border: 2px solid var(--primary);
}
.tl-card {
  background: var(--surface-container); border-radius: var(--radius);
  padding: 16px 18px; border: 1px solid var(--outline-variant);
}
.tl-date {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 600;
  letter-spacing: .04em; color: var(--primary);
}
.tl-title { margin: 5px 0 6px; font-size: 1.05rem; color: var(--on-surface); }
.tl-body { margin: 0; font-size: .9rem; line-height: 1.55; color: var(--on-surface-variant); }

/* ---- BARS (inline SVG, Datawrapper-flavoured) ---- */
.chart-card {
  margin: 0;
  background: var(--surface-container);
  border-radius: var(--radius);
  padding: 28px 26px 22px;
  border: 1px solid var(--outline-variant);
}
.chart-wrap { width: 100%; max-width: 600px; margin: 0 auto; }
.chart-wrap svg { width: 100%; height: auto; display: block; }
.bar-rect { fill: var(--primary); transition: fill .15s, opacity .15s; opacity: .9; }
.bar-rect:hover { opacity: 1; }
.bar-value {
  fill: var(--on-surface); font-size: 13px; font-weight: 700;
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
}
.bar-label { fill: var(--on-surface-variant); font-size: 12px; font-family: var(--font-body); }
.axis-line { stroke: var(--outline-variant); stroke-width: 1; }

/* ---- ACCORDION (flat, hairline-separated) ---- */
.accordion {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--outline-variant);
}
.acc-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--outline-variant);
  border-radius: 0;
  overflow: hidden;
}
.acc-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 4px;
  cursor: pointer;
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--on-surface);
  list-style: none;
  transition: color .15s;
}
.acc-q:hover { color: var(--primary); }
.acc-q::-webkit-details-marker { display: none; }
.acc-chevron { transition: transform .25s cubic-bezier(.4,0,.2,1); color: var(--on-surface-variant); }
.acc-item[open] .acc-q { color: var(--primary); }
.acc-item[open] .acc-chevron { transform: rotate(45deg); color: var(--primary); }  /* + → × */
.acc-a {
  padding: 0 4px 22px;
  font-size: .96rem;
  line-height: 1.7;
  max-width: 72ch;
  color: var(--on-surface-variant);
}
.acc-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-weight: 700;
  font-size: .9rem;
  color: var(--primary);
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.acc-link .material-symbols-rounded { font-size: 18px; transition: transform .15s; }
.acc-link:hover { border-color: var(--primary); }
.acc-link:hover .material-symbols-rounded { transform: translateX(3px); }

/* ---- QUOTES ---- */
.quotes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.quote-card {
  margin: 0;
  position: relative;
  background: var(--surface-container);
  border-radius: var(--radius);
  padding: 26px 24px 20px;
  border: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
}
.quote-mark { font-size: 30px; color: var(--primary); opacity: .55; margin-bottom: 4px; }
.quote-card blockquote {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-style: italic;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--on-surface);
}
.quote-by {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* ---- PROSE ---- */
.prose { max-width: 70ch; color: var(--on-surface-variant); font-size: 1rem; }
.prose h3 {
  font-family: var(--font-serif); color: var(--on-surface);
  font-size: 1.3rem; font-weight: 600; letter-spacing: -.01em; margin: 26px 0 10px;
}
.prose p { line-height: 1.75; margin: 0 0 16px; }
.prose ul { margin: 0 0 16px; padding-left: 20px; line-height: 1.75; }
.prose li { margin-bottom: 7px; }
.prose li::marker { color: var(--primary); }

/* ---- CTA (flat panel + solid ink button; no gradient) ---- */
.section--cta { padding-bottom: 28px; }
.cta-card {
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 52px 32px;
  text-align: center;
  color: var(--on-surface);
}
.cta-card h2 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.4vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--on-surface);
}
.cta-card p { margin: 0 auto 26px; max-width: 56ch; color: var(--on-surface-variant); line-height: 1.6; }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--on-surface);
  color: var(--surface);
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: -.01em;
  transition: transform .15s, opacity .15s;
}
.cta-btn:hover { opacity: .88; }
.cta-btn:active { transform: scale(.98); }

/* ---- Dialog ---- */
.dialog {
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--on-surface);
  max-width: 620px;
  width: calc(100% - 32px);
  padding: 0;
  box-shadow: var(--elev-3);
}
.dialog::backdrop { background: rgba(26,22,12,.46); backdrop-filter: blur(2px); }
.dialog__bar {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid var(--outline-variant);
  position: sticky;
  top: 0;
  background: var(--surface);
}
.dialog__spacer { flex: 1; }
.dialog__body { padding: 28px 30px 32px; }
.dialog__body h2 {
  margin-top: 0; margin-bottom: 14px;
  font-family: var(--font-serif); font-weight: 600; font-size: 1.5rem;
  letter-spacing: -.02em; line-height: 1.2; color: var(--on-surface);
}
.dialog__body p { color: var(--on-surface-variant); line-height: 1.72; font-size: 1rem; margin: 0; }
.dialog__body .card__tags { margin: 0 0 18px; }

/* ---- Footer ---- */
.footer {
  text-align: center;
  padding: 44px 24px 56px;
  margin-top: 48px;
  color: var(--on-surface-variant);
  font-size: .8rem;
  line-height: 1.6;
  border-top: 1px solid var(--outline-variant);
}
.footer p { margin: 0 auto; max-width: 70ch; }

/* ---- Chapter nav (deep-dive pages: prev / all / next) ---- */
.chapter-nav {
  max-width: 1080px;
  margin: 64px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: stretch;
}
.chapter-nav__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  background: var(--surface-container);
  min-width: 0;
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.chapter-nav__link--next { justify-content: flex-end; text-align: right; }
.chapter-nav__link:hover { border-color: var(--outline); box-shadow: var(--elev-2); transform: translateY(-2px); }
.chapter-nav__link--empty { border: none; background: transparent; }
.chapter-nav__link--empty:hover { box-shadow: none; transform: none; }
.chapter-nav__link .material-symbols-rounded { color: var(--primary); flex: 0 0 auto; }
.chapter-nav__meta { display: flex; flex-direction: column; min-width: 0; }
.chapter-nav__dir {
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--on-surface-variant);
}
.chapter-nav__name {
  font-weight: 700; color: var(--on-surface);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.chapter-nav__all {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  padding: 14px 22px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius);
  color: var(--on-surface-variant); font-weight: 600; font-size: .8rem;
  transition: color .15s, border-color .15s;
}
.chapter-nav__all:hover { color: var(--primary); border-color: var(--primary); }
.chapter-nav__all .material-symbols-rounded { font-size: 20px; }
@media (max-width: 600px) {
  .chapter-nav { grid-template-columns: 1fr 1fr; }
  .chapter-nav__all { grid-column: 1 / -1; order: -1; flex-direction: row; }
}

/* ---- Scroll reveal (first paint only; see app.js revealOnScroll) ---- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---- Responsive ---- */
@media (max-width: 700px) {
  .grid,
  .quotes-grid { grid-template-columns: 1fr; }
  .section { padding-top: 60px; }
  .src-link__txt,
  .nav-link__txt { display: none; }
  .src-link,
  .nav-link { padding: 8px 9px; }
}
@media (max-width: 420px) {
  .appbar__inner,
  .sectionnav__inner,
  .section { padding-left: 18px; padding-right: 18px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .section-head h2 { font-size: 1.5rem; }
}

/* Respect reduced-motion: no smooth scroll, no transitions, nothing left hidden */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}