:root {
  color-scheme: light;
  --bg-top: #fbf6ef;
  --bg-bottom: #f3ebe1;
  --card: rgba(255, 251, 247, 0.86);
  --card-strong: rgba(255, 255, 255, 0.96);
  --text: #2f261e;
  --muted: #756558;
  --accent: #c66b3d;
  --accent-deep: #9b4721;
  --success: #2f7d56;
  --danger: #b04c3d;
  --shadow: 0 18px 60px rgba(93, 63, 41, 0.12);
  font-family: "Hiragino Maru Gothic ProN", "YuKyokasho", "BIZ UDPGothic",
    "Hiragino Sans", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 205, 166, 0.7), transparent 28%),
    radial-gradient(circle at bottom right, rgba(214, 173, 125, 0.45), transparent 24%),
    linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 92%);
}

.app-shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 64px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow,
.section-label {
  margin: 0 0 8px;
  color: var(--accent-deep);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1,
.card-header h2 {
  margin: 0;
  line-height: 1.15;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.9rem);
  max-width: 12ch;
}

.lead {
  max-width: 44rem;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.game-card,
.table-card {
  background: var(--card);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: 28px;
}

.table-card {
  margin-top: 20px;
}

.card-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.controls {
  margin-bottom: 20px;
}

.pool-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

input,
button {
  font: inherit;
}

input {
  border: 1px solid rgba(155, 71, 33, 0.18);
  border-radius: 14px;
  background: var(--card-strong);
  color: var(--text);
}

.prompt-panel {
  padding: 22px;
  border-radius: 24px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 228, 212, 0.9));
  border: 1px solid rgba(198, 107, 61, 0.14);
}

.prompt-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.question-numbers {
  display: block;
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--accent-deep);
}

.answer-form {
  margin-top: 24px;
}

.answer-form label {
  display: inline-block;
  margin-bottom: 10px;
  font-weight: 700;
}

.answer-row {
  display: flex;
  gap: 12px;
}

#answer-input {
  flex: 1;
  min-width: 0;
  padding: 0.95rem 1rem;
  font-size: 1.1rem;
}

.primary-button,
.ghost-button {
  border: 0;
  border-radius: 16px;
  padding: 0.9rem 1.25rem;
  cursor: pointer;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease;
}

.primary-button {
  color: #fffaf5;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  box-shadow: 0 10px 24px rgba(155, 71, 33, 0.25);
}

.ghost-button {
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(155, 71, 33, 0.14);
}

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

.primary-button:active,
.ghost-button:active {
  transform: translateY(0);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.stat {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(155, 71, 33, 0.08);
}

.stat-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.stat strong {
  font-size: 1.5rem;
}

.result-message {
  min-height: 1.5em;
  margin: 20px 0 0;
  font-weight: 700;
  line-height: 1.6;
}

.result-message.success {
  color: var(--success);
}

.result-message.error {
  color: var(--danger);
}

.site-footer {
  padding: 22px 4px 0;
}

.coverage-note,
.data-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.data-note {
  margin-top: 10px;
}

.data-note a {
  color: var(--accent-deep);
}

.kana-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(92px, 1fr));
  gap: 12px;
}

.kana-chip {
  padding: 14px 12px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(155, 71, 33, 0.08);
}

.kana-index {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.kana-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--accent-deep);
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 20px, 960px);
    padding-top: 28px;
  }

  .game-card,
  .table-card {
    padding: 20px;
    border-radius: 24px;
  }

  .card-header,
  .answer-row {
    flex-direction: column;
  }

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

  .primary-button,
  .ghost-button {
    width: 100%;
  }
}