:root {
  --bg: #f3ede2;
  --bg-accent: #e3d6c3;
  --surface: rgba(255, 251, 244, 0.94);
  --surface-strong: #fffaf2;
  --ink: #231d17;
  --muted: #6f6558;
  --line: #d6c8b4;
  --accent: #9c4d1c;
  --accent-strong: #7c3810;
  --accent-soft: #f3e2d3;
  --success: #1c7c54;
  --danger: #b33a3a;
  --shadow: 0 16px 32px rgba(35, 29, 23, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --tile-image-size: clamp(32px, calc((100vw - 58px) / 7), 58px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.7), transparent 38%),
    linear-gradient(180deg, var(--bg) 0%, #efe5d7 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page {
  width: min(1040px, calc(100% - 24px));
  margin: 0 auto;
  padding: 20px 0 48px;
}

.page-header,
.hero,
.card {
  background: var(--surface);
  border: 1px solid rgba(214, 200, 180, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.page-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
}

.page-header > div {
  min-width: 0;
}

.header-title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
}

.header-meta {
  color: var(--muted);
  font-size: 0.82rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.9fr);
  gap: 16px;
  align-items: end;
  margin-top: 16px;
  padding: 24px 20px;
  border-radius: 28px;
}

.hero-copy-block {
  min-width: 0;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.84rem;
  font-weight: 700;
}

.hero-title {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.22em;
  margin: 0;
  font-size: clamp(2.2rem, 8vw, 4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-title-chunk {
  white-space: nowrap;
}

.hero-copy {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.button,
.button-secondary,
.button-ghost {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  min-height: 48px;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform 0.18s ease,
    background-color 0.18s ease,
    border-color 0.18s ease;
}

.button {
  background: var(--accent);
  color: #fff;
}

.button-secondary {
  background: var(--surface-strong);
  border-color: var(--line);
  color: var(--ink);
}

.button-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.button:hover,
.button-secondary:hover,
.button-ghost:hover {
  transform: translateY(-1px);
}

.button:disabled,
.button-secondary:disabled,
.button-ghost:disabled {
  background: #ece4d7;
  color: #8f8373;
  border-color: #ddd0be;
  cursor: not-allowed;
  transform: none;
}

.answer-kokushi {
  background: var(--danger);
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  min-width: 0;
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(214, 200, 180, 0.75);
}

.stat-wide {
  grid-column: 1 / -1;
}

.stat-label,
.result-label {
  color: var(--muted);
  font-size: 0.82rem;
}

.stat-value,
.result-value {
  display: block;
  margin-top: 6px;
  font-size: 1.18rem;
  font-weight: 800;
}

.card {
  padding: 18px 16px;
  border-radius: var(--radius-lg);
}

.game-card {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.game-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px;
  gap: 10px;
}

.result-box,
.count-box {
  min-width: 0;
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(214, 200, 180, 0.82);
}

.count-box {
  text-align: center;
}

.result-value[data-state="correct"] {
  color: var(--success);
}

.result-value[data-state="wrong"] {
  color: var(--danger);
}

.hand-grid {
  display: grid;
  grid-template-columns: repeat(14, minmax(0, 1fr));
  gap: 6px;
  align-items: end;
  min-width: 0;
  margin: 0;
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(214, 200, 180, 0.74);
  background: rgba(255, 255, 255, 0.42);
  list-style: none;
}

.hand-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}

.tile-visual {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
}

.tile-visual-image {
  display: block;
  width: min(var(--tile-image-size), 100%);
  height: auto;
  object-fit: contain;
}

.tile-visual-fallback-label {
  display: none;
  min-width: 30px;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  font-weight: 800;
}

.tile-visual[data-image-error="true"] .tile-visual-image {
  display: none;
}

.tile-visual[data-image-error="true"] .tile-visual-fallback-label {
  display: inline-flex;
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.answer-button,
.next-button {
  min-height: 56px;
  font-size: 1rem;
}

.next-button {
  width: 100%;
}

.footer {
  width: min(1040px, calc(100% - 24px));
  margin: auto auto 20px;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 840px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .stat-wide {
    grid-column: auto;
  }
}

@media (max-width: 680px) {
  .page {
    width: min(100% - 16px, 1040px);
    padding-top: 12px;
  }

  .page-header {
    align-items: flex-start;
  }

  .page-header .button-ghost {
    min-height: 40px;
    padding: 8px 12px;
  }

  .hero {
    padding: 20px 16px;
  }

  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat-wide {
    grid-column: 1 / -1;
  }

  .game-head {
    grid-template-columns: minmax(0, 1fr) 92px;
  }

  .hand-grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 7px 4px;
    padding: 10px 8px;
  }

  .answer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 380px) {
  .header-meta {
    display: none;
  }

  .game-head {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .button-secondary,
  .button-ghost {
    transition: none;
  }
}