/* ── Brand tokens ─────────────────────────────────────────────────── */
:root {
  --brand:              #8E8E93;
  --brand-soft:         rgba(142, 142, 147, 0.10);
  --brand-glow:         rgba(142, 142, 147, 0.05);
  --brand-border:       rgba(142, 142, 147, 0.20);
  --brand-border-hover: rgba(142, 142, 147, 0.45);
  --brand-soft-hover:   rgba(142, 142, 147, 0.16);
  --font-body:          -apple-system, BlinkMacSystemFont, 'Geist', system-ui, sans-serif;
  --font-jp:            'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic UI', system-ui, sans-serif;
}

/* ── Dark mode ink tokens ─────────────────────────────────────────── */
[data-theme="dark"] {
  --ink-mute:  #999999;
  --ink-ghost: #8A8A8A;
}

/* ── Kann nav icon ────────────────────────────────────────────────── */
.nav-kanji {
  font-family: var(--font-jp);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--brand);
  line-height: 1;
  letter-spacing: -0.02em;
  transition: color 0.35s ease;
}

/* ── Hero background kanji ────────────────────────────────────────── */
.hero-bg-kanji {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -52%);
  font-family: var(--font-jp);
  font-size: clamp(300px, 45vw, 600px);
  font-weight: 900;
  color: var(--glyph-color);
  opacity: 0.022;
  pointer-events: none;
  line-height: 1;
  user-select: none;
}

/* ── Hero overrides ────────────────────────────────────────────────── */

/* ── Chapters ────────────────────────────────────────────────────── */
.chapter { padding: 6rem 0; }
.chapter-header { margin-bottom: 3.5rem; }
.chapter-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.chapter-num::before {
  content: '';
  display: block;
  width: 1.5rem;
  height: 1px;
  background: currentColor;
}
.chapter-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.chapter-title em { font-style: italic; color: var(--ink-soft); }

/* ── Body copy ────────────────────────────────────────────────────── */
.body-copy {
  font-size: 1.0625rem;
  font-weight: 300;
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 720px;
}
.body-copy + .body-copy { margin-top: 1.5rem; }
.body-copy strong { font-weight: 500; color: var(--ink); }
.pull-quote {
  border-left: 2px solid var(--brand);
  padding: 0.25rem 0 0.25rem 1.75rem;
  margin: 2.5rem 0;
  transition: border-color 0.35s ease;
}
.pull-quote p {
  font-family: var(--font-display);
  font-size: 1.4375rem;
  font-style: italic;
  font-weight: 300;
  color: var(--ink);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

/* ── Figma placeholder ────────────────────────────────────────────── */
.figma-placeholder {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  background: var(--surface-1);
  border: 1px solid var(--border-mid);
}
.figma-placeholder-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 4rem 2rem;
  min-height: 360px;
}
.figma-placeholder-icon { opacity: 0.22; color: var(--ink-mute); }
.figma-placeholder-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  text-align: center;
}
.figma-placeholder-desc {
  font-size: 0.8125rem;
  color: var(--ink-ghost);
  text-align: center;
  max-width: 300px;
  line-height: 1.5;
}
.figma-placeholder-tag {
  position: absolute;
  top: 1rem; right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  background: var(--surface-inset);
  color: var(--ink-ghost);
  border: 1px solid var(--border-mid);
}

/* ── Grids ───────────────────────────────────────────────────────── */
.two-up   { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.three-up { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }

/* ── Domain grid ─────────────────────────────────────────────────── */
.domain-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.domain-chip {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-mute);
  border: 1px solid var(--border-mid);
}
.domain-chip.premium {
  background: var(--brand-soft);
  color: var(--brand);
  border-color: var(--brand-border);
  transition: color 0.35s ease, background 0.35s ease, border-color 0.35s ease;
}

/* ── Quiz mockup ─────────────────────────────────────────────────── */
.quiz-card {
  background: var(--surface-2);
  border: 1px solid var(--border-mid);
  border-radius: 1rem;
  overflow: hidden;
}
.quiz-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.quiz-progress-track {
  flex: 1;
  height: 3px;
  background: var(--surface-3);
  border-radius: 99px;
  overflow: hidden;
  margin: 0 1rem;
}
.quiz-progress-fill {
  height: 100%;
  background: var(--brand);
  border-radius: 99px;
  width: 30%;
  transition: background 0.35s ease;
}
.quiz-lives {
  display: flex;
  gap: 0.3rem;
  align-items: center;
}
.life {
  width: 7px; height: 7px;
  border-radius: 50%;
}
.life.full  { background: var(--brand); transition: background 0.35s ease; }
.life.empty { background: var(--surface-4); }
.quiz-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.quiz-deck-tag {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  border: 1px solid var(--brand-border);
  transition: color 0.35s ease, background 0.35s ease, border-color 0.35s ease;
}
.quiz-body {
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.875rem;
}
.quiz-prompt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.quiz-character {
  font-family: var(--font-jp);
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--ink);
  line-height: 1.1;
  text-align: center;
}
.quiz-furigana {
  font-family: var(--font-jp);
  font-size: 0.75rem;
  color: var(--ink-ghost);
  letter-spacing: 0.08em;
}
.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.75rem;
}
.quiz-opt {
  background: var(--surface-3);
  border: 1px solid var(--border-mid);
  border-radius: 0.625rem;
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.625rem;
  cursor: default;
}
.quiz-opt.correct {
  background: var(--brand-soft);
  border-color: var(--brand-border);
  color: var(--ink);
  transition: background 0.35s ease, border-color 0.35s ease;
}
.quiz-opt-key {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  background: var(--surface-4);
  color: var(--ink-ghost);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.quiz-opt.correct .quiz-opt-key {
  background: var(--brand);
  color: var(--surface);
  transition: background 0.35s ease;
}

/* ── Kana grid ────────────────────────────────────────────────────── */
.kana-showcase {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
}
.kana-showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.kana-showcase-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.kana-showcase-sub {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  color: var(--ink-ghost);
  letter-spacing: 0.06em;
}
.kana-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--border);
}
.kana-cell {
  background: var(--surface-1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 0.5rem;
  gap: 0.25rem;
  cursor: default;
  transition: background 0.2s;
}
.kana-cell:hover { background: var(--surface-3); }
.kana-cell:hover .kana-char { color: var(--brand); }
.kana-char {
  font-family: var(--font-jp);
  font-size: 1.375rem;
  color: var(--ink-soft);
  line-height: 1;
  transition: color 0.2s, color 0.35s ease;
}
.kana-rom {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.kana-cell.blank { background: var(--surface); pointer-events: none; }

/* ── SRS demo ──────────────────────────────────────────────────────── */
.srs-demo {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
}
.srs-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  margin-bottom: 1rem;
}
.srs-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.srs-word {
  font-family: var(--font-jp);
  font-size: 0.9375rem;
  color: var(--ink-soft);
  width: 4rem;
  flex-shrink: 0;
}
.srs-track {
  flex: 1;
  height: 4px;
  background: var(--surface-3);
  border-radius: 99px;
  overflow: hidden;
}
.srs-fill {
  height: 100%;
  border-radius: 99px;
  background: var(--brand);
  transition: background 0.35s ease;
}
.srs-next {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  color: var(--ink-ghost);
  white-space: nowrap;
  width: 4.5rem;
  text-align: right;
}

/* ── Tier comparison ──────────────────────────────────────────────── */
.tier-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
}
.tier-card {
  background: var(--surface-1);
  padding: 2rem;
}
.tier-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.tier-label-badge {
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.5625rem;
}
.tier-label-badge.free {
  background: var(--surface-inset);
  color: var(--ink-mute);
  border: 1px solid var(--border-mid);
}
.tier-label-badge.premium {
  background: var(--brand-soft);
  color: var(--brand);
  border: 1px solid var(--brand-border);
  transition: color 0.35s ease, background 0.35s ease, border-color 0.35s ease;
}
.tier-label-badge.lifetime {
  background: color-mix(in srgb, var(--ink) 8%, transparent);
  color: var(--ink);
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
}
.tier-items { display: flex; flex-direction: column; gap: 0.875rem; }
.tier-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}
.tier-item-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 0.45rem;
}
.tier-item-dot.free   { background: var(--ink-ghost); }
.tier-item-dot.premium { background: var(--brand); transition: background 0.35s ease; }
.tier-item-text {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
.tier-item-text strong { font-weight: 500; color: var(--ink); }

/* ── Process list ────────────────────────────────────────────────── */
.process-list { list-style: none; }
.process-item {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.process-item:first-child { border-top: 1px solid var(--border); }
.process-num {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--ink-ghost);
  padding-top: 0.2rem;
}
.process-text { font-size: 0.9375rem; color: var(--ink-soft); line-height: 1.6; }
.process-text strong { color: var(--ink); font-weight: 500; display: block; margin-bottom: 0.25rem; }

/* ── Code block ──────────────────────────────────────────────────── */
.code-note {
  background: var(--surface-2);
  border: 1px solid var(--border-mid);
  border-radius: 0.75rem;
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-top: 2rem;
  overflow-x: auto;
}
.code-note .value { color: var(--brand); transition: color 0.35s ease; }

/* ── Theme switcher ────────────────────────────────────────────────── */
.theme-switcher {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 0.875rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}
.theme-switcher-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  white-space: nowrap;
}
.theme-switcher-chips { display: flex; gap: 0.375rem; flex-wrap: wrap; }
.ts-chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--ink-mute);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.ts-chip:hover { color: var(--ink); }
.ts-chip.active {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--ink);
}
.ts-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.ts-badge {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 0.125rem 0.375rem;
  border-radius: 999px;
  transition: color 0.35s ease, background 0.35s ease;
}

/* ── Interactive demos ───────────────────────────────────────────── */
.kan-demo {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 1rem;
  overflow: hidden;
}
.kan-demo-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.kan-demo-title {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.kan-demo-hint {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.04em;
  color: var(--ink-ghost);
}
.kan-demo-body { padding: 1.5rem 1.25rem 1.75rem; }
.kan-demo-body.nav-phone {
  padding: 2rem 1.25rem 3.5rem;
}
.two-up .kan-demo {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.two-up .kan-demo-head {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
}
.two-up .kan-demo-hint {
  white-space: normal;
  line-height: 1.45;
}
.two-up .kan-demo-body {
  flex: 1;
}
.two-up .nav-phone {
  max-width: none;
}
.two-up .curved-bar-wrap {
  max-width: none;
}
.two-up .coin-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.625rem;
  width: 100%;
  max-width: 16rem;
  margin: 0 auto;
}
.two-up .kan-coin {
  width: 4.75rem;
  height: 4.75rem;
  margin: 0 auto;
}

/* Curved navigation */
.nav-phone {
  max-width: 22rem;
  margin: 0 auto;
}
.curved-bar-wrap {
  position: relative;
  min-height: 5.5rem;
  max-width: 22rem;
  margin: 0 auto;
  overflow: visible;
}
.curved-bar-svg {
  display: block;
  width: 100%;
  height: 5.5rem;
  overflow: visible;
}
.curved-bar-track {
  fill: none;
  stroke: var(--surface-3);
  stroke-linecap: round;
  opacity: 0.95;
}
[data-theme="light"] .curved-bar-track {
  stroke: color-mix(in srgb, var(--surface) 70%, var(--ink) 8%);
}
.curved-bar-indicator {
  fill: none;
  stroke: var(--brand);
  stroke-linecap: round;
  opacity: 0.85;
  transition: stroke 0.35s ease;
}
.curved-bar-tabs {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.curved-bar-tab {
  position: absolute;
  pointer-events: auto;
  border: none;
  background: transparent;
  color: var(--ink-mute);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  transform: translate(-50%, -50%) rotate(var(--tab-rot, 0deg));
  transition: color 0.25s ease, opacity 0.25s;
  opacity: 0.55;
}
.curved-bar-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.34, 1.2, 0.64, 1);
}
.curved-bar-tab.is-active {
  color: #fff;
  opacity: 1;
}
.curved-bar-tab.is-active .curved-bar-mark {
  transform: scale(1.12);
}
.curved-bar-tab svg { width: 1.35rem; height: 1.35rem; }
.curved-bar-tab .tab-glyph {
  font-family: var(--font-jp);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
}

/* Character tiles */
.char-lab { display: flex; flex-direction: column; gap: 1.75rem; }
.char-type-row {
  display: flex;
  justify-content: center;
  gap: clamp(1.25rem, 4vw, 2.5rem);
  flex-wrap: wrap;
}
.char-type-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.625rem;
}
.char-type-label {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-ghost);
}
.char-ramp {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.char-item {
  position: relative;
  width: 3.75rem;
  height: 3.75rem;
  border-radius: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
  background: transparent;
  border: 0 solid transparent;
  padding: 0;
  font: inherit;
  appearance: none;
  -webkit-appearance: none;
  transition: background 0.25s linear, border-color 0.25s, box-shadow 0.25s;
  overflow: hidden;
}
.char-item[data-progress="0"] {
  border-width: 0;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ink) 12%, transparent);
}
.char-item[data-progress="1"] {
  background: linear-gradient(to bottom, transparent 0%, color-mix(in srgb, var(--brand) 10%, transparent) 80%, color-mix(in srgb, var(--brand) 20%, transparent) 100%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 80%, transparent);
}
.char-item[data-progress="2"] {
  background: linear-gradient(to bottom, transparent 0%, color-mix(in srgb, var(--brand) 20%, transparent) 60%, color-mix(in srgb, var(--brand) 40%, transparent) 100%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 80%, transparent);
}
.char-item[data-progress="3"] {
  background: linear-gradient(to bottom, color-mix(in srgb, var(--ink) 5%, transparent) 0%, color-mix(in srgb, var(--brand) 20%, transparent) 40%, color-mix(in srgb, var(--brand) 80%, transparent) 100%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 80%, transparent);
}
.char-item[data-progress="4"],
.char-item[data-progress="5"] {
  background: linear-gradient(to bottom, color-mix(in srgb, var(--ink) 10%, transparent) 0%, color-mix(in srgb, var(--brand) 20%, transparent) 20%, color-mix(in srgb, var(--brand) 80%, transparent) 100%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 80%, transparent);
}
.char-item[data-progress="6"] {
  background: transparent;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--ink) 20%, transparent);
}
.char-glyph {
  font-family: var(--font-jp);
  line-height: 1;
  transition: color 0.25s, font-size 0.25s, font-weight 0.25s;
}
.char-item[data-progress="0"] .char-glyph {
  font-size: 1.875rem;
  font-weight: 400;
  color: color-mix(in srgb, var(--ink) 50%, transparent);
}
.char-item[data-progress="1"] .char-glyph,
.char-item[data-progress="2"] .char-glyph,
.char-item[data-progress="3"] .char-glyph,
.char-item[data-progress="4"] .char-glyph,
.char-item[data-progress="5"] .char-glyph {
  font-size: 2rem;
  font-weight: 500;
  color: color-mix(in srgb, var(--brand) 60%, var(--ink));
}
.char-item[data-progress="6"] .char-glyph {
  font-size: 2rem;
  font-weight: 400;
  color: color-mix(in srgb, var(--ink) 32%, transparent);
}
.char-reading {
  position: absolute;
  bottom: 0.35rem;
  font-family: var(--font-jp);
  font-size: 0.6875rem;
  font-weight: 700;
  color: inherit;
  opacity: 0.55;
  line-height: 1;
}
.char-item[data-progress="6"] .char-reading { opacity: 0.35; }
.char-marker {
  position: absolute;
  top: 0.3rem;
  right: 0.35rem;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--ink-ghost);
  line-height: 1;
}
.char-shimmer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: inherit;
  mask-image: linear-gradient(135deg, transparent, white 45%, transparent);
}
.char-star {
  position: absolute;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--brand);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  opacity: 0;
  animation: char-star-pulse 2s ease-in-out infinite;
}
@keyframes char-star-pulse {
  0%, 100% { opacity: 0; transform: scale(0.4) rotate(0deg); }
  45% { opacity: 0.85; transform: scale(1) rotate(120deg); }
}
.char-ramp-label {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-ghost);
  text-align: center;
  margin-bottom: 0.625rem;
}

/* Coins */
.coin-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0;
}
.coin-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.625rem;
  justify-content: center;
}
.kan-coin {
  width: 4.75rem;
  height: 4.75rem;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.12));
  transition: transform 0.12s ease-out;
  will-change: transform;
}
.kan-coin-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  user-select: none;
}

/* ── Divider ─────────────────────────────────────────────────────── */
.divider-kanji {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 3rem 0;
}
.divider-kanji::before,
.divider-kanji::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider-kanji-char {
  font-family: var(--font-jp);
  font-size: 1.25rem;
  color: var(--ink-ghost);
  opacity: 0.3;
  flex-shrink: 0;
}

/* ── Footer ─────────────────────────────────────────────────────── */
footer {
  padding: 4rem 0 5rem;
  margin-top: 4rem;
}
.footer-kanji {
  font-family: var(--font-jp);
  font-size: 3rem;
  font-weight: 700;
  color: white;
  opacity: 0.1;
  line-height: 1;
  margin-bottom: 1rem;
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .two-up { grid-template-columns: 1fr; }
  .three-up { grid-template-columns: 1fr; }
  .tier-grid { grid-template-columns: 1fr; }
  .exec-summary { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  nav { padding: 1rem 1.25rem; }
  .wrap, .wrap-wide { padding: 0 1.25rem; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .quiz-options { grid-template-columns: 1fr; }
}