* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #f8f8fa;
  --card: #ffffff;
  --card-border: #dddde4;
  --accent: #7e4eb8;
  --accent-dim: rgba(126, 78, 184, 0.1);
  --correct: #1a9a45;
  --wrong: #d03040;
  --text: #2a2a3e;
  --text-dim: #6b6b80;
  --white: #1a1a2e;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  --c0: #d03040;
  --c1: #3070d0;
  --c2: #1a9a45;
  --c3: #c89018;
  --c4: #7e4eb8;
  --c5: #c86830;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 18px;
  overflow-x: hidden;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px;
  padding-top: calc(48px + var(--safe-top));
  padding-bottom: calc(24px + var(--safe-bottom));
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.back-link {
  position: fixed;
  top: 12px;
  left: 12px;
  font-size: 13px;
  color: #6b6b80;
  text-decoration: none;
  letter-spacing: 1px;
  font-family: sans-serif;
  z-index: 999;
  padding: 8px;
}

.hidden { display: none !important; }

/* ---- Title Screen ---- */
#title-screen {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  animation: fadeIn 0.5s ease-out;
}
.title-icon { font-size: 64px; margin-bottom: 12px; }
.game-title {
  font-size: 52px;
  font-weight: 900;
  letter-spacing: 6px;
  color: var(--accent);
}
.tagline {
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--text-dim);
  margin-top: 8px;
}
.rules-box {
  margin: 32px 0;
  text-align: left;
  background: var(--card);
  border: 1.5px solid var(--card-border);
  border-radius: 12px;
  padding: 20px 24px;
  width: 100%;
}
.rules-box p { font-size: 16px; line-height: 1.8; color: var(--text); }
.hl { color: var(--accent); font-weight: 700; }
.best-score { font-size: 13px; color: var(--text-dim); margin-top: 12px; letter-spacing: 1px; }

/* ---- Buttons ---- */
.btn-main {
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 2px;
  border: none;
  border-radius: 10px;
  padding: 0 32px;
  min-height: 58px;
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
  width: 100%;
  max-width: 340px;
}
.btn-main:active { transform: scale(0.97); opacity: 0.9; }

/* ---- Game Screen ---- */
#game-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  animation: fadeIn 0.3s ease-out;
}
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-bottom: 16px;
}
.round-label { font-size: 14px; font-weight: 700; letter-spacing: 2px; color: var(--text-dim); }
.score-label { font-size: 22px; font-weight: 900; color: var(--accent); letter-spacing: 1px; }

.status-label {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--white);
  text-align: center;
  margin-bottom: 24px;
  min-height: 32px;
}
.status-label.watching { color: var(--accent); }
.status-label.your-turn { color: var(--c1); }
.status-label.correct { color: var(--correct); }
.status-label.wrong { color: var(--wrong); }

/* ---- Tile Grid ---- */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  width: 100%;
  max-width: 340px;
  margin-bottom: 24px;
}

.tile {
  aspect-ratio: 1;
  border-radius: 16px;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  overflow: hidden;
}

.tile-0 { background: color-mix(in srgb, var(--c0) 25%, var(--bg)); border-color: color-mix(in srgb, var(--c0) 30%, transparent); }
.tile-1 { background: color-mix(in srgb, var(--c1) 25%, var(--bg)); border-color: color-mix(in srgb, var(--c1) 30%, transparent); }
.tile-2 { background: color-mix(in srgb, var(--c2) 25%, var(--bg)); border-color: color-mix(in srgb, var(--c2) 30%, transparent); }
.tile-3 { background: color-mix(in srgb, var(--c3) 25%, var(--bg)); border-color: color-mix(in srgb, var(--c3) 30%, transparent); }
.tile-4 { background: color-mix(in srgb, var(--c4) 25%, var(--bg)); border-color: color-mix(in srgb, var(--c4) 30%, transparent); }
.tile-5 { background: color-mix(in srgb, var(--c5) 25%, var(--bg)); border-color: color-mix(in srgb, var(--c5) 30%, transparent); }

.tile.flash-0 { background: var(--c0); border-color: var(--c0); box-shadow: 0 0 30px var(--c0); }
.tile.flash-1 { background: var(--c1); border-color: var(--c1); box-shadow: 0 0 30px var(--c1); }
.tile.flash-2 { background: var(--c2); border-color: var(--c2); box-shadow: 0 0 30px var(--c2); }
.tile.flash-3 { background: var(--c3); border-color: var(--c3); box-shadow: 0 0 30px var(--c3); }
.tile.flash-4 { background: var(--c4); border-color: var(--c4); box-shadow: 0 0 30px var(--c4); }
.tile.flash-5 { background: var(--c5); border-color: var(--c5); box-shadow: 0 0 30px var(--c5); }

.tile.disabled { pointer-events: none; opacity: 0.5; }
.tile:active { transform: scale(0.95); }

.tile.correct-flash { background: var(--correct) !important; border-color: var(--correct) !important; box-shadow: 0 0 30px var(--correct); }
.tile.wrong-flash { background: var(--wrong) !important; border-color: var(--wrong) !important; box-shadow: 0 0 30px var(--wrong); }

/* ---- Input Dots ---- */
.input-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
  min-height: 24px;
}
.dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--card-border);
  transition: background 0.2s;
}
.dot.filled { background: var(--accent); }
.dot.correct-dot { background: var(--correct); }
.dot.wrong-dot { background: var(--wrong); }

.hint-label {
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-align: center;
  min-height: 20px;
}

/* ---- Game Over ---- */
#gameover-screen {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  animation: fadeIn 0.5s ease-out;
}
.gameover-heading {
  font-size: 32px;
  font-weight: 900;
  letter-spacing: 4px;
  color: var(--white);
  margin-bottom: 16px;
}
.final-round {
  font-size: 18px;
  color: var(--text-dim);
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.final-score {
  font-size: 64px;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 8px;
}
.final-rank {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 2px;
  margin-bottom: 32px;
}

@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}

@media (max-height: 667px) {
  .game-title { font-size: 40px; }
  .rules-box { padding: 14px 18px; margin: 20px 0; }
  .tile-grid { gap: 10px; max-width: 280px; }
  .status-label { font-size: 20px; margin-bottom: 16px; }
}