:root {
  --bg: #f7f3ee;
  --surface: #ffffff;
  --surface-2: #f1ece5;
  --text: #2b2420;
  --muted: #7a6f66;
  --border: #e3dbd1;
  --accent: #c8102e;
  --accent-soft: #fbe3e6;
  --accent-text: #ffffff;
  --ok: #2e8b57;
  --ok-soft: #e1f3e8;
  --ko: #c8102e;
  --ko-soft: #fbe3e6;
  --shadow: 0 8px 30px rgba(60, 40, 20, .08);
  --radius: 16px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-jp: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17141a;
    --surface: #221e25;
    --surface-2: #2c2730;
    --text: #f1ebe6;
    --muted: #a59a92;
    --border: #3a343f;
    --accent: #ff4d63;
    --accent-soft: #3d1f27;
    --accent-text: #1a0f12;
    --ok: #4cc485;
    --ok-soft: #1c3528;
    --ko: #ff5c6f;
    --ko-soft: #3d1f27;
    --shadow: 0 8px 30px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
}

[hidden] { display: none !important; }

.site-header {
  text-align: center;
  padding: 32px 16px 8px;
}
.site-header h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
}
.logo-jp {
  font-family: var(--font-jp);
  color: var(--accent);
}
.tagline {
  margin: 4px 0 0;
  color: var(--muted);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 16px 48px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.panel h2 {
  font-size: 1.05rem;
  margin: 28px 0 12px;
}
.panel h2:first-child { margin-top: 0; }

/* --- Choix de l'écriture --- */
.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 8px;
  border: 2px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
  transition: border-color .15s, background .15s;
}
.segmented small {
  font-family: var(--font-jp);
  font-weight: 400;
  color: var(--muted);
}
.segmented input:checked + span {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.segmented input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

/* --- Groupes de kana --- */
.group { margin-bottom: 18px; }
.group-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.group-head h3 {
  margin: 0;
  font-size: .95rem;
  margin-right: auto;
}
.group-head .count { color: var(--muted); font-weight: 400; }

.rows {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 8px;
}
.row-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 6px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  transition: border-color .15s, background .15s, opacity .15s;
  opacity: .6;
}
.row-chip .chars {
  font-family: var(--font-jp);
  font-size: 1.1rem;
  letter-spacing: .05em;
}
.row-chip .romaji {
  font-size: .75rem;
  color: var(--muted);
}
.row-chip[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  opacity: 1;
}
.row-chip:hover { opacity: 1; }

/* --- Options --- */
.option {
  display: flex;
  gap: 10px;
  align-items: center;
  cursor: pointer;
}
.option input { width: 18px; height: 18px; accent-color: var(--accent); }

/* --- Boutons --- */
.btn {
  font: inherit;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: 10px;
  padding: 10px 18px;
  cursor: pointer;
  transition: transform .05s, background .15s, opacity .15s;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-secondary { background: var(--surface-2); color: var(--text); border-color: var(--border); }
.btn-ghost { background: transparent; color: var(--muted); border-color: var(--border); }
.btn-ghost:hover { color: var(--text); }
.btn-small { padding: 4px 10px; font-size: .85rem; }
.btn-big { width: 100%; margin-top: 28px; padding: 14px; font-size: 1.1rem; }

/* --- Quiz --- */
.quiz-top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-weight: 600;
}
.stats { display: flex; gap: 12px; margin-left: auto; }
.stats .ok { color: var(--ok); }
.stats .ko { color: var(--ko); }
.stats .streak { color: var(--muted); }

.progress {
  height: 6px;
  background: var(--surface-2);
  border-radius: 99px;
  margin: 12px 0 20px;
  overflow: hidden;
}
#progress-bar {
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width .25s;
}

.card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  text-align: center;
  padding: 24px 16px 16px;
  transition: background .15s, border-color .15s;
}
.card.correct { background: var(--ok-soft); border-color: var(--ok); }
.card.wrong { background: var(--ko-soft); border-color: var(--ko); animation: shake .3s; }

.kana {
  font-family: var(--font-jp);
  font-size: clamp(5.5rem, 24vw, 9rem);
  line-height: 1.15;
  user-select: none;
}
.feedback {
  min-height: 1.6em;
  font-weight: 600;
  font-size: 1.1rem;
}
.card.correct .feedback { color: var(--ok); }
.card.wrong .feedback { color: var(--ko); }
.feedback .given { font-weight: 400; color: var(--muted); font-size: .9rem; }

#answer {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 14px 16px;
  font: inherit;
  font-size: 1.4rem;
  text-align: center;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  outline: none;
}
#answer:focus { border-color: var(--accent); }

.quiz-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}
.hint {
  text-align: center;
  color: var(--muted);
  font-size: .85rem;
  margin: 12px 0 0;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* --- Résultats --- */
#results h2 { text-align: center; font-size: 1.5rem; }
.result-score { text-align: center; }
.big-score {
  font-size: 4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
#result-detail { color: var(--muted); }

.mistakes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 8px;
}
.mistake {
  text-align: center;
  padding: 8px 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
}
.mistake .k { font-family: var(--font-jp); font-size: 1.8rem; line-height: 1.2; }
.mistake .r { font-size: .85rem; color: var(--muted); }

.result-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}

@media (max-width: 480px) {
  .panel { padding: 16px; }
  .segmented span { padding: 10px 4px; font-size: .9rem; }
  .rows { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}