:root {
  --bg: #1a1a2e;
  --bg2: #16213e;
  --card: rgba(255,255,255,0.04);
  --card-hover: rgba(255,255,255,0.07);
  --text: #e2e8f0;
  --text2: #7c8bb5;
  --text3: #3e4a6e;
  --accent: #e2b714;
  --accent2: #f59e0b;
  --correct: #22c55e;
  --wrong: #ef4444;
  --border: rgba(255,255,255,0.06);
  --radius: 16px;
  --font: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --transition: 0.25s ease;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: var(--bg); }

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Grid bg */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo i { color: var(--accent); font-size: 1.6rem; }

.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon:hover { color: var(--accent); border-color: var(--accent); }

/* Mode Bar */
.mode-bar {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.mode-group {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px 6px;
}

.mode-label {
  font-size: 0.75rem;
  color: var(--text3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 8px;
}

.mode-btn, .diff-btn {
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  background: transparent;
  border: none;
  color: var(--text2);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
}

.mode-btn:hover, .diff-btn:hover { color: var(--text); }
.mode-btn.active, .diff-btn.active {
  background: var(--accent);
  color: var(--bg);
}

/* Stats Bar */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 24px;
  opacity: 0.4;
  transition: opacity 0.5s;
}

.stats-bar.active { opacity: 1; }

.stat-item { text-align: center; }

.stat-value {
  display: block;
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-key {
  font-size: 0.7rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
  display: block;
}

.timer-stat .stat-value { color: var(--text); }

/* Typing Area */
.typing-area {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  margin-bottom: 20px;
  cursor: text;
  min-height: 180px;
  transition: border-color var(--transition);
}

.typing-area:focus-within {
  border-color: rgba(226,183,20,0.3);
}

.typing-input {
  position: absolute;
  opacity: 0;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: text;
  z-index: 2;
}

.words-display {
  font-family: var(--mono);
  font-size: 1.35rem;
  line-height: 2.2;
  position: relative;
  user-select: none;
}

.words-display .word {
  display: inline-block;
  margin-right: 10px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

.words-display .word.current {
  border-bottom-color: rgba(226,183,20,0.3);
}

.words-display .letter {
  position: relative;
  transition: color 0.1s;
}

.words-display .letter.default { color: var(--text2); }
.words-display .letter.correct { color: var(--correct); }
.words-display .letter.wrong { color: var(--wrong); text-decoration: underline; }
.words-display .letter.extra { color: var(--wrong); opacity: 0.6; }

/* Caret */
.typing-caret {
  position: absolute;
  width: 2px;
  height: 1.5em;
  background: var(--accent);
  border-radius: 2px;
  transition: left 0.08s ease, top 0.08s ease;
  animation: caretBlink 1s step-end infinite;
  z-index: 1;
  pointer-events: none;
}

@keyframes caretBlink {
  50% { opacity: 0; }
}

.typing-area:focus-within .typing-caret { animation: none; opacity: 1; }

/* Restart */
.restart-row {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}

.restart-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.restart-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: rotate(-90deg);
}

/* Results Overlay */
.results-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,10,20,0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.3s;
}

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

.results-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  max-width: 520px;
  width: 100%;
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { opacity:0; transform:translateY(30px); }
  to { opacity:1; transform:translateY(0); }
}

.results-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 28px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.results-title i { color: var(--accent); }

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.result-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
}

.result-item.big { grid-column: span 1; }

.result-value {
  display: block;
  font-family: var(--mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.result-item.big .result-value { font-size: 2.5rem; }

.result-label {
  font-size: 0.75rem;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.results-chart {
  margin-bottom: 24px;
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
}

.results-actions {
  display: flex;
  justify-content: center;
}

.btn-primary {
  padding: 12px 32px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover { background: var(--accent2); transform: translateY(-2px); }

/* Leaderboard */
.leaderboard-card { max-width: 480px; }

.leaderboard-list {
  max-height: 320px;
  overflow-y: auto;
  margin-bottom: 20px;
}

.lb-entry {
  display: grid;
  grid-template-columns: 40px 1fr 80px 80px;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--card);
  border-radius: 10px;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.lb-rank {
  font-weight: 800;
  font-family: var(--mono);
  color: var(--accent);
}

.lb-diff { color: var(--text3); font-size: 0.8rem; }
.lb-wpm { font-weight: 700; font-family: var(--mono); text-align: right; }
.lb-acc { color: var(--text2); text-align: right; font-size: 0.85rem; }

.lb-entry:nth-child(1) .lb-rank { color: #fbbf24; }
.lb-entry:nth-child(2) .lb-rank { color: #94a3b8; }
.lb-entry:nth-child(3) .lb-rank { color: #cd7f32; }

.empty-lb { text-align: center; color: var(--text3); padding: 40px; }

/* Footer */
.footer {
  margin-top: auto;
  text-align: center;
  padding: 24px 0 8px;
  font-size: 0.82rem;
  color: var(--text3);
}

.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 640px) {
  .words-display { font-size: 1.1rem; }
  .typing-area { padding: 24px 20px; }
  .mode-bar { flex-direction: column; align-items: center; }
  .results-card { padding: 28px 20px; }
  .result-item.big .result-value { font-size: 2rem; }
  .stats-bar { gap: 24px; }
  .stat-value { font-size: 1.5rem; }
}