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

:root {
  --bg: #f8f8fa;
  --card: #ffffff;
  --card-border: #dddde4;
  --accent: #4a6ee0;
  --accent-dim: rgba(74, 110, 224, 0.1);
  --correct: #1a9a45;
  --correct-dim: rgba(26, 154, 69, 0.1);
  --wrong: #d03040;
  --wrong-dim: rgba(208, 48, 64, 0.1);
  --text: #2a2a3e;
  --text-dim: #6b6b80;
  --white: #1a1a2e;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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; }
.btn-main:disabled { opacity: 0.4; pointer-events: none; }

/* ---- Game Screen ---- */
#game-screen {
  display: flex;
  flex-direction: column;
  flex: 1;
  animation: fadeIn 0.3s ease-out;
}
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.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; }

.progress-bar {
  height: 4px;
  background: var(--card-border);
  border-radius: 2px;
  margin-bottom: 20px;
  overflow: hidden;
  position: relative;
}
.progress-bar::after {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: var(--progress, 0%);
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.category-label {
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
  text-align: center;
  margin-bottom: 4px;
  letter-spacing: 1px;
}
.instruction-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
  letter-spacing: 2px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.attempts-label {
  text-align: center;
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-bottom: 16px;
}

/* ---- Sortable List ---- */
.sortable-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  flex: 1;
  touch-action: none;
}

.sort-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  padding: 16px 18px;
  cursor: grab;
  transition: transform 0.15s, border-color 0.15s, background 0.15s;
  user-select: none;
  -webkit-user-select: none;
}
.sort-item:active { cursor: grabbing; }

.sort-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sort-label {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}
.sort-handle {
  font-size: 20px;
  color: var(--text-dim);
  flex-shrink: 0;
}

.sort-item.dragging {
  opacity: 0.9;
  border-color: var(--accent);
  background: rgba(108, 140, 255, 0.08);
  transform: scale(1.03);
  z-index: 10;
}
.sort-item.correct-pos {
  border-color: var(--correct);
  background: var(--correct-dim);
}
.sort-item.correct-pos .sort-num {
  background: var(--correct-dim);
  color: var(--correct);
}
.sort-item.wrong-pos {
  border-color: var(--wrong);
  background: var(--wrong-dim);
}
.sort-item.wrong-pos .sort-num {
  background: var(--wrong-dim);
  color: var(--wrong);
}

.btn-lock {
  align-self: center;
  margin-bottom: 16px;
}

/* ---- Round Feedback ---- */
.round-feedback {
  text-align: center;
  animation: slideUp 0.3s ease-out;
}
.rf-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.rf-text.perfect { color: var(--correct); }
.rf-text.close { color: #c89018; }
.rf-text.miss { color: var(--wrong); }

.rf-correct-order {
  margin-bottom: 20px;
}
.rf-item {
  font-size: 15px;
  color: var(--text-dim);
  padding: 6px 0;
  line-height: 1.4;
}
.rf-item span { color: var(--text); font-weight: 600; }

.btn-next-round { max-width: 240px; margin: 0 auto; }

/* ---- 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-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: 24px;
}
.final-stats {
  font-size: 15px;
  color: var(--text-dim);
  line-height: 2;
  margin-bottom: 32px;
}

@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-height: 667px) {
  .game-title { font-size: 40px; }
  .rules-box { padding: 14px 18px; margin: 20px 0; }
  .sort-item { padding: 12px 14px; }
  .sort-label { font-size: 16px; }
  .category-label { font-size: 18px; }
}