/* =============================================================
   The Modernized Coursebook — Bio-Warm 2026
   The site IS the coursebook. The Companion is the vocab layer.
   ============================================================= */

:root {
  /* Bio-Warm 2026 palette */
  --lime:         #B6E528;
  --lime-deep:    #8FB81E;
  --lime-tint:    #EEF9C9;
  --gold:         #FFC800;
  --gold-deep:    #D9A800;
  --gold-tint:    #FFF4C2;
  --coral:        #FF6B47;
  --coral-deep:   #E84F2E;
  --coral-tint:   #FFE2D7;
  --hot-pink:     #FF5C99;
  --sky:          #3DA9FC;
  --sky-tint:     #D9EFFE;

  --snow:         #FFFFFF;
  --cream:        #FFF8E8;
  --ink:          #0F172A;
  --ink-soft:     #475569;
  --ink-muted:    #94A3B8;
  --border:       #E2E8F0;
  --border-soft:  #F1F5F9;
  --shadow-coral: 0 4px 0 0 var(--coral-deep);

  /* Radii */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Easing */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out:    cubic-bezier(0.4, 0.0, 0.2, 1);

  --max: 1280px;
}

/* ============== RESET ============== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--cream);
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

/* ============== BG GLYPHS ============== */
.bg-glyphs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.glyph, .loop {
  position: absolute;
  opacity: 0.22;
}
.g1 { top: 8%;  left: 4%;  width: 32px; height: 32px; color: var(--coral); animation: drift1 14s linear infinite; }
.g2 { top: 18%; right: 6%; width: 24px; height: 24px; color: var(--lime); animation: drift2 18s linear infinite; }
.g3 { top: 42%; left: 8%;  width: 36px; height: 36px; color: var(--gold); animation: drift3 20s linear infinite; }
.g4 { top: 60%; right: 10%; width: 20px; height: 20px; color: var(--hot-pink); animation: drift1 22s linear infinite reverse; }
.g5 { top: 78%; left: 14%; width: 28px; height: 28px; color: var(--lime); animation: drift2 16s linear infinite reverse; }
.g6 { top: 30%; right: 22%; width: 16px; height: 16px; color: var(--coral); animation: drift3 24s linear infinite; }
.loop { width: 220px; height: 220px; }
.l1 { top: 12%; right: -60px; color: var(--gold); opacity: 0.18; animation: spin 60s linear infinite; }
.l2 { bottom: 18%; left: -80px; color: var(--lime); opacity: 0.20; animation: spin 80s linear infinite reverse; }

@keyframes drift1 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(24px, 14px) rotate(45deg); }
}
@keyframes drift2 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(-30px, 10px) rotate(-30deg); }
}
@keyframes drift3 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(14px, -26px) rotate(60deg); }
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============== TOP BAR ============== */
.topbar {
  position: relative;
  z-index: 10;
  padding: 22px 32px;
}
.topbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--coral) 0%, var(--gold) 100%);
  display: grid;
  place-items: center;
  box-shadow: 0 4px 0 0 var(--coral-deep);
}
.brand-mark svg path { fill: var(--snow); }
.brand-mark svg circle { fill: var(--cream); }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.brand-name em {
  font-style: normal;
  color: var(--coral);
  margin: 0 4px;
  font-weight: 800;
}
.brand-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-sub {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 18px;
  background: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 0 0 var(--ink);
}
.brand-sub-prefix {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-style: normal;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  opacity: 0.7;
}
.brand-sub-name {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.brand-sub-mod {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-style: italic;
  font-weight: 600;
  font-size: 0.95rem;
  background: linear-gradient(135deg, var(--lime) 0%, var(--gold) 50%, var(--coral) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.topnav {
  display: flex;
  gap: 28px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  justify-self: center;
}
.topnav a {
  position: relative;
  padding: 6px 0;
  transition: color 0.2s var(--ease-out);
}
.topnav a:hover { color: var(--coral); }
.topnav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 2.5px;
  background: var(--coral);
  transition: all 0.3s var(--ease-spring);
  border-radius: 2px;
}
.topnav a:hover::after { left: 0; width: 100%; }

.topbar-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  background: var(--coral);
  color: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-full);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 0.98rem;
  box-shadow: 0 4px 0 0 var(--ink);
  transition: all 0.2s var(--ease-spring);
}
.topbar-cta .arrow { width: 26px; height: 10px; color: var(--snow); }
.topbar-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 0 var(--ink);
  background: var(--coral-deep);
}
.topbar-cta:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 0 var(--ink);
}

/* ============== HERO ============== */
.hero {
  position: relative;
  z-index: 2;
  padding: 60px 32px 100px;
}
.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 64px;
  align-items: center;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--coral);
  padding: 7px 16px;
  background: var(--snow);
  border: 2px solid var(--ink);
  border-radius: var(--radius-full);
  margin-bottom: 28px;
  box-shadow: 0 3px 0 0 var(--ink);
}
.kicker-mark { width: 14px; height: 14px; color: var(--coral); }
.kicker.centered { display: inline-flex; }

.hero-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-variation-settings: "wdth" 100;
  font-size: clamp(3.2rem, 7.5vw, 6.8rem);
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin-bottom: 32px;
}
.hero-title .line { display: block; position: relative; }
.hero-title .hl {
  position: relative;
  font-style: italic;
  font-weight: 800;
  background: linear-gradient(135deg, var(--coral) 0%, var(--gold) 50%, var(--lime) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}
.hl-underline {
  position: absolute;
  left: 0;
  bottom: -16px;
  width: 100%;
  height: 12px;
  pointer-events: none;
  z-index: -1;
}
.hl-underline path {
  stroke: var(--gold);
  stroke-width: 4;
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 600;
  stroke-dashoffset: 600;
  animation: draw-underline 1.4s var(--ease-spring) 0.4s forwards;
}
@keyframes draw-underline {
  to { stroke-dashoffset: 0; }
}

.hero-lede {
  font-family: 'Inter', sans-serif;
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 580px;
  margin-bottom: 36px;
}
.hero-lede strong { color: var(--coral); font-weight: 700; }
.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 17px 30px;
  border-radius: var(--radius-full);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 1.02rem;
  cursor: pointer;
  transition: all 0.2s var(--ease-spring);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.cta.primary {
  background: var(--coral);
  color: var(--snow);
  border: 2.5px solid var(--ink);
  box-shadow: 0 4px 0 0 var(--ink);
}
.cta.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 0 var(--ink);
  background: var(--coral-deep);
}
.cta.primary:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 0 var(--ink);
}
.cta.primary.small {
  padding: 12px 22px;
  font-size: 0.92rem;
  box-shadow: 0 3px 0 0 var(--ink);
}
.cta.primary.small:hover { box-shadow: 0 5px 0 0 var(--ink); }
.cta.primary .arrow,
.cta.primary.small .arrow {
  width: 30px;
  height: 12px;
  color: var(--snow);
}
.cta.ghost {
  background: var(--snow);
  color: var(--ink);
  border: 2.5px solid var(--ink);
  box-shadow: 0 4px 0 0 var(--ink);
}
.cta.ghost:hover {
  background: var(--gold-tint);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 0 var(--ink);
}
.cta.ghost:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 0 var(--ink);
}
.cta.ghost.small {
  padding: 12px 22px;
  font-size: 0.92rem;
  box-shadow: 0 3px 0 0 var(--ink);
}
.cta.ghost.small:hover { box-shadow: 0 5px 0 0 var(--ink); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.meta-pill {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  border: 2px solid var(--ink);
  background: var(--snow);
  color: var(--ink);
}
.meta-pill strong {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1rem;
}
.meta-pill.sage    { background: var(--lime-tint); }
.meta-pill.clay    { background: var(--coral-tint); }
.meta-pill.mustard { background: var(--gold-tint); }
.meta-pill.blush   { background: var(--coral-tint); }

/* ============== HERO ART (OPEN BOOK) ============== */
.hero-art {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 540px;
  margin-left: auto;
}
.art-frame {
  position: relative;
  width: 100%;
  height: 100%;
}
.art-frame-border {
  position: absolute;
  inset: -10px;
  width: calc(100% + 20px);
  height: calc(100% + 20px);
  animation: drift1 22s ease-in-out infinite;
}
.art-book {
  position: absolute;
  inset: 6%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  background: var(--snow);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 0 0 var(--ink);
  overflow: hidden;
  border: 2.5px solid var(--ink);
}
.book-page {
  padding: 26px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.book-page.coursebook-page-side {
  background: var(--snow);
  border-right: 1.5px solid var(--ink);
}
.book-page.companion-page-side {
  background: var(--cream);
  border-left: 1.5px solid var(--ink);
}
.book-fold {
  width: 6px;
  background: linear-gradient(to right, rgba(15,23,42,0.18) 0%, rgba(15,23,42,0.06) 50%, rgba(15,23,42,0.18) 100%);
}
.page-corner {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--gold);
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  padding: 3px 7px;
  letter-spacing: 0.05em;
}
.page-corner.companion {
  background: var(--coral);
  color: var(--snow);
}
.page-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.page-label.companion { color: var(--coral); }
.page-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.7rem;
  line-height: 1.0;
  color: var(--ink);
  margin-bottom: 4px;
  font-style: italic;
}
.page-sub {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
}
.page-title-companion {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.7rem;
  line-height: 1.0;
  color: var(--coral);
  margin-bottom: 4px;
  font-style: italic;
}
.page-title-companion .el-hint {
  font-style: italic;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  opacity: 0.65;
}
.lesson-pieces {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 14px;
}
.lesson-pieces span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 4px;
  background: var(--lime-tint);
  border: 1.5px solid var(--ink);
  color: var(--ink);
}
.vocab-mini {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.vocab-mini .vocab-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  font-size: 0.85rem;
  padding: 4px 0;
  border-bottom: 1.5px dashed var(--ink);
  opacity: 0.95;
}
.vocab-mini .vocab-row:last-child { border-bottom: 0; }
.vocab-mini .en {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: var(--ink);
}
.vocab-mini .el {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-style: italic;
  font-weight: 700;
  color: var(--coral);
  font-size: 0.92rem;
}
.page-stamp {
  position: absolute;
  bottom: 12px;
  left: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: var(--ink);
  letter-spacing: 0.1em;
  border: 1.5px solid var(--ink);
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--snow);
}
.page-sparkle {
  position: absolute;
  width: 14px;
  height: 14px;
  color: var(--gold);
  pointer-events: none;
}
.page-sparkle.s1 { top: 24%; left: 14%; animation: drift2 8s ease-in-out infinite; }
.page-sparkle.s2 { bottom: 36%; right: 18%; color: var(--coral); animation: drift3 10s ease-in-out infinite; }
.art-sparkle {
  position: absolute;
  width: 28px;
  height: 28px;
  color: var(--gold);
}
.art-sparkle.s1 { top: 6%;  left: -2%; animation: drift2 12s ease-in-out infinite; }
.art-sparkle.s2 { bottom: 8%; right: -4%; color: var(--hot-pink); animation: drift1 16s ease-in-out infinite; }
.art-asterisk {
  position: absolute;
  width: 36px;
  height: 36px;
  top: 50%;
  right: -8%;
  color: var(--lime);
  animation: drift3 14s ease-in-out infinite;
}

/* ============== THE TWO THINGS ============== */
.section-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}
.section-inner.narrow { max-width: 1000px; }
.section-head {
  text-align: left;
  max-width: 760px;
  margin-bottom: 48px;
}
.section-head.centered { text-align: center; margin: 0 auto 56px; }
.section-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-variation-settings: "wdth" 100;
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  line-height: 1.0;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin: 14px 0 18px;
}
.section-title em {
  color: var(--coral);
  font-style: italic;
}
.section-title.centered { text-align: center; }
.section-lede {
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 640px;
}
.section-lede strong { color: var(--ink); font-weight: 700; }

.explainer {
  position: relative;
  z-index: 2;
  padding: 40px 0 80px;
}
.two-things {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 18px;
  align-items: stretch;
  margin-bottom: 24px;
}
.thing-card {
  background: var(--snow);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  border: 2.5px solid var(--ink);
  box-shadow: 0 6px 0 0 var(--ink);
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s var(--ease-spring);
}
.thing-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 9px 0 0 var(--ink);
}
.thing-card.coursebook { background: var(--snow); }
.thing-card.companion { background: var(--coral-tint); }
.thing-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--lime);
  color: var(--ink);
  border: 2px solid var(--ink);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.thing-tag.clay {
  background: var(--coral);
  color: var(--snow);
}
.thing-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.9rem;
  color: var(--ink);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.0;
}
.thing-card.companion .thing-title { color: var(--coral-deep); font-style: italic; }
.thing-desc {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.thing-desc em { color: var(--coral); font-weight: 600; }
.thing-list {
  list-style: none;
  margin-bottom: 22px;
}
.thing-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--ink);
  padding: 7px 0;
  border-bottom: 1.5px dashed var(--ink);
}
.thing-list li:last-child { border-bottom: 0; }
.bullet { width: 18px; height: 18px; color: var(--lime-deep); flex-shrink: 0; }
.bullet.clay { color: var(--coral); }
.thing-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-full);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
  transition: all 0.2s var(--ease-spring);
  border: 2.5px solid var(--ink);
  box-shadow: 0 3px 0 0 var(--ink);
}
.thing-cta.paper {
  background: var(--snow);
  color: var(--ink);
}
.thing-cta.paper:hover {
  background: var(--lime-tint);
  transform: translateY(-2px);
  box-shadow: 0 5px 0 0 var(--ink);
}
.thing-cta.clay {
  background: var(--coral);
  color: var(--snow);
}
.thing-cta.clay:hover {
  background: var(--coral-deep);
  transform: translateY(-2px);
  box-shadow: 0 5px 0 0 var(--ink);
}
.thing-cta:active { transform: translateY(2px); box-shadow: 0 1px 0 0 var(--ink); }
.arrow-sm { width: 24px; height: 10px; }
.thing-cta.clay .arrow-sm { color: var(--snow); }

.thing-plus {
  display: grid;
  place-items: center;
}
.thing-plus svg circle { fill: var(--cream); stroke: var(--ink); }
.thing-plus svg text { fill: var(--coral); }
.two-things-foot {
  text-align: center;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-style: italic;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
  margin-top: 24px;
}
.two-things-foot em {
  background: linear-gradient(135deg, var(--coral) 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

/* ============== FILTER CHIPS ============== */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 36px;
  padding: 6px;
  background: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-full);
  width: fit-content;
  max-width: 100%;
  box-shadow: 0 3px 0 0 var(--ink);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: var(--radius-full);
  transition: all 0.2s var(--ease-spring);
  color: var(--ink);
  background: transparent;
  border: 2px solid transparent;
}
.chip:hover { background: var(--gold-tint); }
.chip.active {
  background: var(--coral);
  color: var(--snow);
  border-color: var(--ink);
  box-shadow: 0 2px 0 0 var(--ink);
  transform: translateY(-1px);
}
.chip.sage.active    { background: var(--lime);  color: var(--ink); border-color: var(--ink); }
.chip.mustard.active { background: var(--gold);  color: var(--ink); border-color: var(--ink); }
.chip-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 9999px;
  background: rgba(0,0,0,.08);
}
.chip.active .chip-count { background: var(--ink); color: var(--snow); }
.chip-sep { width: 1px; height: 18px; background: var(--ink); margin: 0 4px; }

/* ============== UNITS SPLIT GRID ============== */
.units-section {
  position: relative;
  z-index: 2;
  padding: 100px 0 80px;
}
.units-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.unit-split {
  background: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-xl);
  display: grid;
  grid-template-columns: 0.85fr auto 1.15fr;
  overflow: hidden;
  position: relative;
  box-shadow: 0 6px 0 0 var(--ink);
  transition: all 0.3s var(--ease-spring);
  opacity: 0;
  transform: translateY(30px);
}
.unit-split.visible { opacity: 1; transform: translateY(0); }
.unit-split:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 0 0 var(--ink);
}
.unit-split.featured {
  background: var(--cream);
}
.unit-split.hidden { display: none; }

.unit-side {
  padding: 28px 28px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
}
.v1-side { background: var(--snow); }
.v2-side {
  background: var(--coral-tint);
  position: relative;
}
.v2-side::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 95% 5%, rgba(255,200,0,0.18) 0%, transparent 35%),
    radial-gradient(circle at 5% 95%, rgba(182,229,40,0.18) 0%, transparent 35%);
  pointer-events: none;
}

.side-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.side-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--gold);
  color: var(--ink);
  border: 2px solid var(--ink);
  letter-spacing: 0.04em;
}
.side-tag.v2 {
  background: var(--coral);
  color: var(--snow);
}
.side-name {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}
.side-tag.v2 + .side-name { color: var(--coral); }
.el-tag {
  font-style: italic;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-left: 4px;
}

.unit-fold {
  display: grid;
  place-items: center;
  position: relative;
  width: 4px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--gold) 50%, var(--coral) 100%);
}

/* Featured v1 cover */
.v1-cover {
  flex-grow: 1;
  margin: 12px -8px 16px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2.5px solid var(--ink);
  min-height: 280px;
  background: var(--snow);
}
.v1-cover img { width: 100%; height: 100%; object-fit: cover; }
.v1-cover-fallback { width: 100%; height: 100%; display: block; }
.v1-meta { padding-left: 4px; }
.v1-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.7rem;
  color: var(--ink);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
  line-height: 1.0;
}
.v1-theme {
  font-size: 0.88rem;
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.v1-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink);
  padding: 6px 12px;
  background: var(--lime);
  border: 2px solid var(--ink);
  border-radius: var(--radius-full);
  transition: all 0.2s var(--ease-out);
  width: fit-content;
  box-shadow: 0 2px 0 0 var(--ink);
}
.v1-link.mini { margin-top: 16px; }
.v1-link:hover {
  background: var(--gold);
  transform: translateY(-1px);
  box-shadow: 0 3px 0 0 var(--ink);
}
.v1-link:active { transform: translateY(1px); box-shadow: 0 1px 0 0 var(--ink); }

/* Featured v2 body */
.v2-number-badge {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}
.big-num {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 3.6rem;
  line-height: 1.0;
  color: var(--coral);
  letter-spacing: -0.04em;
}
.term-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--gold);
  color: var(--ink);
  border: 2px solid var(--ink);
  letter-spacing: 0.04em;
}
.v2-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: clamp(1.6rem, 2.4vw, 2rem);
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: -0.025em;
}
.v2-tagline {
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

/* ============== VOCABULARY TABLE ============== */
.vocab-table {
  background: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-md);
  padding: 4px 16px;
  margin-bottom: 22px;
  box-shadow: 0 3px 0 0 var(--ink);
}
.vocab-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1.5px dashed var(--ink);
  font-size: 1rem;
  position: relative;
}
.vocab-row::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--gold) 50%, var(--coral) 100%);
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.2s;
}
.vocab-row:hover::before { opacity: 1; }
.vocab-row:last-child { border-bottom: 0; }
.vocab-row .en {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
}
.vocab-row .arrow-mark {
  font-family: 'Bricolage Grotesque', sans-serif;
  color: var(--coral);
  font-weight: 800;
  font-size: 1.1rem;
  text-align: center;
}
.vocab-row .el {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-style: italic;
  font-weight: 700;
  color: var(--coral);
  font-size: 1.05rem;
  text-align: right;
}

.vocab-table.compact { padding: 2px 12px; margin-bottom: 16px; }
.vocab-table.compact .vocab-row { font-size: 0.92rem; padding: 7px 0; }
.vocab-table.compact .vocab-row .el { font-size: 0.98rem; }

.v2-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
}

/* Compact v1 mini */
.v1-mini {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-left: 4px;
}
.v1-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--gold);
  padding: 3px 9px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  display: inline-block;
  width: fit-content;
}
.v1-mini-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.55rem;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.v1-pages {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--ink);
  padding: 4px 10px;
  background: var(--lime-tint);
  border: 2px solid var(--ink);
  border-radius: var(--radius-full);
  display: inline-block;
  align-self: flex-start;
}

/* Compact v2 mini */
.v2-mini-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  color: var(--coral);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 0.92rem;
  align-self: flex-start;
  transition: gap 0.2s var(--ease-out);
}
.v2-mini-link:hover { gap: 10px; }
.v2-mini-link .arrow-sm { color: var(--coral); }

/* ============== TEACHER ============== */
.teacher-section {
  position: relative;
  z-index: 2;
  padding: 60px 0 100px;
}
.teacher-card {
  position: relative;
  background: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-xl);
  padding: 64px 56px;
  text-align: center;
  box-shadow: 0 8px 0 0 var(--ink);
}
.teacher-card-border { display: none; }
.kicker.centered { display: inline-flex; margin: 0 auto 16px; }
.teacher-lede {
  max-width: 720px;
  margin: 0 auto 0;
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--ink-soft);
}
.teacher-lede strong { color: var(--coral); font-weight: 700; }
.teacher-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  text-align: left;
}
.teacher-pillar {
  padding: 24px 24px;
  background: var(--cream);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 0 0 var(--ink);
  transition: transform 0.2s var(--ease-spring), box-shadow 0.2s var(--ease-spring);
}
.teacher-pillar:hover {
  transform: translateY(-3px);
  box-shadow: 0 7px 0 0 var(--ink);
}
.pillar-mark {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--lime);
  color: var(--ink);
  border: 2.5px solid var(--ink);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}
.pillar-mark svg { width: 22px; height: 22px; }
.pillar-mark.sage    { background: var(--coral); color: var(--snow); }
.pillar-mark.mustard { background: var(--gold); color: var(--ink); }
.teacher-pillar h4 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--ink);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.teacher-pillar p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

/* ============== FOOTER ============== */
.footer {
  position: relative;
  z-index: 2;
  padding: 32px;
  border-top: 2.5px solid var(--ink);
  text-align: center;
}
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-brand {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  color: var(--ink);
  font-size: 0.95rem;
}
.footer-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--ink-muted);
}

/* ============== REDUCED MOTION ============== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .unit-split { opacity: 1; transform: none; }
  .hl-underline path { stroke-dashoffset: 0; }
}

/* ============== RESPONSIVE ============== */
@media (max-width: 1024px) {
  .topbar-inner { grid-template-columns: auto 1fr auto; gap: 16px; }
  .topnav { display: none; }
  .brand-sub { grid-column: 1 / -1; justify-self: start; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-art { max-width: 380px; margin: 0 auto; }
  .unit-split { grid-template-columns: 1fr auto 1fr; }
  .two-things { grid-template-columns: 1fr; }
  .thing-plus { display: none; }
  .teacher-grid { grid-template-columns: 1fr; gap: 16px; }
  .teacher-card { padding: 44px 32px; }
}
@media (max-width: 768px) {
  .topbar { padding: 16px 20px; }
  .topbar-inner { grid-template-columns: 1fr auto; }
  .brand-sub { display: none; }
  .hero { padding: 40px 20px 60px; }
  .section-inner { padding: 0 20px; }
  .hero-title { font-size: clamp(2.6rem, 12vw, 4.2rem); }
  .unit-split { grid-template-columns: 1fr; }
  .unit-fold { width: 100%; height: 4px; }
  .teacher-card { padding: 36px 22px; }
  .filter-row { width: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .chip { white-space: nowrap; }
  .art-book { inset: 4%; }
  .book-page { padding: 18px 12px; }
  .page-title, .page-title-companion { font-size: 1.3rem; }
  .vocab-row { font-size: 0.92rem; padding: 7px 0; }
  .vocab-row .el { font-size: 0.95rem; }
  .thing-card { padding: 24px 22px; }
  .teacher-card { padding: 36px 22px; }
}


/* =============================================================
   GRAPHIC NOVEL & OPEN-SOURCE REALIA EXTENSIONS (rev 5)
   ============================================================= */

.hero-art {
  aspect-ratio: auto;
  max-width: 580px;
  width: 100%;
}

.comic-hero-panel {
  background: var(--snow);
  border: 3px solid var(--ink);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 0 0 var(--ink);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.comic-caption-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--gold);
  border-bottom: 3px solid var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.05em;
}

.comic-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comic-style-tag {
  background: var(--snow);
  border: 2px solid var(--ink);
  border-radius: var(--radius-full);
  padding: 2px 10px;
  font-size: 0.68rem;
}

.comic-hero-img-wrap {
  position: relative;
  border-bottom: 3px solid var(--ink);
  background: var(--ink);
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.comic-hero-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s var(--ease-out);
}

.comic-hero-panel:hover .comic-hero-img-wrap img {
  transform: scale(1.02);
}

.comic-dual-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--snow);
}

.comic-dual-pill {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: background 0.2s var(--ease-out);
}

.comic-dual-pill.v1-pill {
  border-right: 2.5px solid var(--ink);
  background: var(--snow);
}
.comic-dual-pill.v1-pill:hover {
  background: var(--lime-tint);
}

.comic-dual-pill.v2-pill {
  background: var(--coral-tint);
}
.comic-dual-pill.v2-pill:hover {
  background: var(--gold-tint);
}

.comic-dual-pill .pill-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--coral-deep);
}
.comic-dual-pill.v1-pill .pill-tag {
  color: var(--ink);
}

.comic-dual-pill strong {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.15;
}

.comic-dual-pill .pill-sub {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

/* ============== TWO-TRACK VISUAL SYSTEM SECTION ============== */
.visual-system-section {
  position: relative;
  z-index: 2;
  padding: 10px 0 60px;
}

.visual-system-banner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.vs-card {
  background: var(--snow);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 6px 0 0 var(--ink);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.vs-card.graphic-track {
  background: linear-gradient(180deg, var(--snow) 0%, var(--lime-tint) 100%);
}

.vs-card.realia-track {
  background: linear-gradient(180deg, var(--snow) 0%, var(--gold-tint) 100%);
}

.vs-track-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.vs-track-header .thing-tag {
  margin-bottom: 0;
}

.vs-age-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--snow);
  border: 1.5px solid var(--ink);
  border-radius: var(--radius-full);
  padding: 3px 10px;
}

.vs-card h3 {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.vs-card p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.vs-sample-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: auto;
  padding-top: 8px;
}

.vs-mini-fig {
  background: var(--snow);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 3px 0 0 var(--ink);
}

.vs-mini-fig img {
  width: 100%;
  height: 135px;
  object-fit: cover;
  border-bottom: 2px solid var(--ink);
}

.vs-mini-fig figcaption {
  padding: 6px 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--ink);
  text-align: center;
}

.vs-country-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: auto;
  padding-top: 8px;
}

.vs-country-card {
  background: var(--snow);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 3px 0 0 var(--ink);
  display: flex;
  flex-direction: column;
}

.vs-country-card img {
  width: 100%;
  height: 88px;
  object-fit: cover;
  border-bottom: 2px solid var(--ink);
}

.vs-country-card figcaption {
  padding: 5px 8px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px;
}

.vs-country-card figcaption strong {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-size: 0.82rem;
  color: var(--ink);
}

.vs-country-card figcaption span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--ink-soft);
}

/* ============== UNIT 1 REAL COUNTRY STRIP ============== */
.unit1-real-strip {
  background: var(--cream);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin: 0 -4px 16px;
  box-shadow: 0 3px 0 0 var(--ink);
}

.real-strip-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.real-strip-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.real-thumb {
  display: flex;
  flex-direction: column;
  background: var(--snow);
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
}

.real-thumb img {
  width: 100%;
  height: 52px;
  object-fit: cover;
  border-bottom: 1.5px solid var(--ink);
}

.real-thumb small {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.64rem;
  font-weight: 700;
  color: var(--ink);
  padding: 3px 4px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.v1-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.v1-link.secondary {
  background: var(--snow);
}

/* ============== TEACHER LAB BANNER ============== */
.teacher-lab-banner {
  margin: 32px auto 0;
  max-width: 780px;
  background: var(--cream);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 6px 0 0 var(--ink);
  text-align: left;
}

.teacher-lab-banner img {
  width: 100%;
  max-height: 340px;
  object-fit: cover;
  border-bottom: 2.5px solid var(--ink);
}

.teacher-lab-banner figcaption {
  padding: 12px 18px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.teacher-lab-banner figcaption strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  color: var(--coral-deep);
  letter-spacing: 0.05em;
}

.teacher-lab-banner figcaption span {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

@media (max-width: 1024px) {
  .visual-system-banner { grid-template-columns: 1fr; }
  .hero-art { max-width: 540px; }
}

@media (max-width: 768px) {
  .comic-dual-strip { grid-template-columns: 1fr; }
  .comic-dual-pill.v1-pill { border-right: 0; border-bottom: 2px solid var(--ink); }
  .real-strip-thumbs { grid-template-columns: repeat(2, 1fr); }
  .vs-sample-row { grid-template-columns: 1fr; }
}