:root {
  --bg: #0f172a;
  --card: #111827dd;
  --text: #e5e7eb;
  --accent: #38bdf8;
  --muted: #94a3b8;
  --good: #22c55e;
  --bad: #ef4444;
  --btn: #1f2937;
  --btn-hover: #374151;
}

html, body {
  /* fallback anciens navigateurs */
  min-height: 100vh;

  /* hauteur “small viewport” = zone vraiment visible (iOS Safari) */
  min-height: 100svh;

  /* iOS plus ancien : remplit l’écran disponible */
  height: -webkit-fill-available;
  max-width: 100%;
  overflow-x: hidden;
  overscroll-behavior-x: none; /* évite le pan latéral */
  touch-action: pan-y; /* iOS : pan uniquement vertical */
}

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, #1e293b, transparent), var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100%;         /* s’appuie sur les lignes ci-dessus */
  align-items: center;
  justify-content: center;
  padding: 20px;
}

* {
  box-sizing: border-box;
}

.app {
  width: min(900px, 100%);
  padding: 0 12px;
  flex: 1; /* prend tout l’espace vertical dispo */
  display: flex;
  flex-direction: column;
  justify-content: center;
}

header {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

header h1 {
  font-size: 1.1rem;
  margin: 0;
}

/* Ajouter un peu d'air en bas pour éviter que le clavier ou la barre iOS pousse */
footer {
  padding-bottom: env(safe-area-inset-bottom, 20px);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
}

button, select, .toggle {
  background: var(--btn);
  color: var(--text);
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: .95rem;
  cursor: pointer;
  transition: .15s;
}

button:hover {
  background: var(--btn-hover);
}

button.primary {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px #0ea5e9 inset;
}

button:focus {
  outline: none;
}

button:focus-visible {
  box-shadow: 0 0 0 3px rgba(56, 189, 248, .5);
}

.pill {
  padding: 8px 10px;
  font-size: .85rem;
  color: var(--muted);
  border-radius: 9999px;
  border: 1px solid #334155;
}

.stats {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .9rem;
  color: var(--muted);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}

.dot.ok {
  background: var(--good);
}

.dot.ko {
  background: var(--bad);
}

.cardwrap {
  perspective: 1200px;
  margin: 18px 0 12px;
  padding: 0 2px;
}

.card {
  position: relative;
  margin: auto;
  width: 100%;
  max-width: 660px;
  height: 360px;
  border-radius: 18px;
  background: linear-gradient(135deg, #0b1220, #0b1326 55%, #0d1b2a);
  border: 1px solid #1f2a44;
  box-shadow: 0 10px 35px #0008;
  transform-style: preserve-3d;
  transition: transform .6s;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.card.flipped {
  transform: rotateY(180deg);
}

.face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  backface-visibility: hidden;
  padding: 24px;
  text-align: center;
}

.front .kanji {
  font-size: 8rem;
  line-height: 1;
}

.front .hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: .95rem;
}

.back {
  transform: rotateY(180deg);
}

.meaning {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.readings {
  color: var(--muted);
  font-size: 1rem;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 12px 0 2px;
}

.row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
}

.legend kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #0b1220;
  border: 1px solid #243044;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: .85rem;
}

.footerrow {
  justify-content: space-between;
  margin-top: 6px;
}

.ok {
  border-color: var(--good);
  box-shadow: 0 0 0 1px var(--good) inset;
}

@media (max-width: 820px) {
  .card {
    height: 320px;
  }
  .front .kanji {
    font-size: 6.5rem;
  }
}

@media (max-width: 390px) {
  .card {
    height: 300px;
  }
  .front .kanji {
    font-size: 5.8rem;
  }
}