* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #1a1a2e;
  --bg2: #16213e;
  --accent: #f4a261;
  --accent2: #e9c46a;
  --accent3: #e76f51;
  --text: #eee;
  --dim: #888;
  --success: #2ecc71;
  --fail: #e74c3c;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic Pro", "Noto Sans JP", sans-serif;
  min-height: 100vh;
  overflow: hidden;
}

.screen { display: none; height: 100vh; }
.screen.active { display: flex; flex-direction: column; }

/* ── Title ── */
#title-screen {
  align-items: center;
  justify-content: center;
  gap: 20px;
}
#title-screen h1 {
  font-size: 64px;
  color: var(--accent);
  text-shadow: 0 0 40px rgba(244, 162, 97, 0.3);
}
.subtitle { color: var(--accent2); font-size: 20px; }
.menu { display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.menu button {
  background: var(--bg2);
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 16px 40px;
  font-size: 22px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.menu button:hover {
  background: var(--accent);
  color: var(--bg);
}
.sign-count { color: var(--dim); margin-top: 16px; }

/* ── Game ── */
.game-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--bg2);
}
#score { color: var(--accent); font-size: 24px; }
#timer { color: var(--accent2); font-size: 24px; font-weight: bold; }

.game-main {
  flex: 1;
  display: flex;
  gap: 20px;
  padding: 20px;
  overflow: hidden;
}

.camera-box {
  position: relative;
  flex: 1.2;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
}
.camera-box video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}
.camera-box canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  transform: scaleX(-1);
}
.status {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  color: var(--accent2);
}

.prompt-box {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.prompt-label { color: var(--dim); font-size: 20px; }
.prompt-char {
  font-size: 180px;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 60px rgba(244, 162, 97, 0.4);
}
.word-progress {
  font-size: 36px;
  letter-spacing: 8px;
  color: var(--dim);
  min-height: 50px;
}
.word-progress .done { color: var(--success); }
.word-progress .current { color: var(--accent); font-weight: bold; text-decoration: underline; }

.result-banner {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 64px;
  padding: 20px 60px;
  border-radius: 16px;
  z-index: 10;
  animation: pop 0.3s ease;
}
.result-banner.hidden { display: none; }
.result-banner.correct { background: var(--success); color: #fff; }
.result-banner.incorrect { background: var(--fail); color: #fff; }
@keyframes pop {
  0% { transform: translate(-50%, -50%) scale(0.5); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}
.admin-only { display: none; }
body.is-admin .admin-only { display: block; }

/* ── Calibration ── */
.cal-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--bg2);
}
.cal-header h2 { color: var(--accent); }

.cal-main {
  flex: 1;
  display: flex;
  gap: 20px;
  padding: 20px;
  overflow: hidden;
}

.gojuon-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.gojuon-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}
.gojuon-btn {
  aspect-ratio: 1;
  font-size: 24px;
  border: 2px solid #333;
  background: var(--bg2);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
}
.gojuon-btn:hover { border-color: var(--accent); }
.gojuon-btn.recorded {
  border-color: var(--success);
  background: rgba(46, 204, 113, 0.15);
}
.gojuon-btn.recording {
  border-color: var(--accent3);
  background: rgba(231, 111, 81, 0.3);
  animation: pulse 0.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.gojuon-btn .type-badge {
  position: absolute;
  top: 2px; right: 2px;
  font-size: 10px;
}
.gojuon-section {
  grid-column: 1 / -1;
  color: var(--accent2);
  font-size: 14px;
  font-weight: bold;
  padding: 8px 0 4px;
  border-top: 1px solid #333;
  margin-top: 8px;
}

.cal-controls {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  background: var(--bg);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #333;
  margin-bottom: 8px;
}
.cal-controls select, .cal-controls button {
  padding: 8px 12px;
  font-size: 14px;
  border-radius: 4px;
  border: 1px solid #444;
  background: var(--bg2);
  color: var(--text);
  cursor: pointer;
}
.cal-controls button:hover { background: var(--accent); color: var(--bg); }
.import-label {
  padding: 8px 12px;
  font-size: 14px;
  border-radius: 4px;
  border: 1px solid #444;
  background: var(--bg2);
  cursor: pointer;
}
.import-label:hover { background: var(--accent); color: var(--bg); }

.back-btn {
  background: none;
  border: 1px solid #555;
  color: var(--text);
  padding: 6px 16px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
}
.back-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ── Mobile ── */
@media (max-width: 768px) {
  #title-screen h1 { font-size: 36px; }
  .subtitle { font-size: 14px; }
  .menu button { padding: 12px 24px; font-size: 18px; }

  .game-main, .cal-main { flex-direction: column; }
  .game-main { padding: 8px; gap: 8px; }
  .cal-main { padding: 8px; gap: 8px; }

  .camera-box { flex: none; height: 40vh; }
  .prompt-box { flex: none; padding: 8px; gap: 8px; }
  .prompt-char { font-size: 80px; }
  .prompt-label { font-size: 14px; }
  .word-progress { font-size: 24px; letter-spacing: 4px; }

  .game-top { padding: 8px 12px; }
  #score, #timer { font-size: 18px; }

  .gojuon-grid { grid-template-columns: repeat(5, 1fr); gap: 4px; }
  .gojuon-btn { font-size: 16px; }
  .gojuon-section { font-size: 12px; padding: 4px 0 2px; margin-top: 4px; }

  .gojuon-panel { overflow-y: auto; max-height: 45vh; }

  .cal-controls { padding: 8px; gap: 4px; }
  .cal-controls select, .cal-controls button { font-size: 12px; padding: 6px 8px; }

  .result-banner { font-size: 36px; padding: 12px 30px; }
}

@media (max-width: 480px) {
  #title-screen h1 { font-size: 28px; }
  .camera-box { height: 35vh; }
  .prompt-char { font-size: 60px; }
  .gojuon-btn { font-size: 14px; }
}