@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #58a6ff;
  --accent-2: #3fb950;
  --danger: #f85149;
  --warning: #d29922;
  --purple: #bc8cff;
  --on-accent: #04121f;
  --game-bg-1: #0b0f16;
  --game-bg-2: #0d1117;
  --grid-line: rgba(255, 255, 255, 0.03);
  --overlay-bg: rgba(13, 17, 23, 0.85);
  --shadow: rgba(0, 0, 0, 0.4);
  --shadow-strong: rgba(0, 0, 0, 0.5);
  --accent-soft-bg: rgba(88, 166, 255, 0.12);
  --accent-soft-border: rgba(88, 166, 255, 0.35);
  --accent-glow: rgba(88, 166, 255, 0.25);
  --row-hover: rgba(255, 255, 255, 0.03);
}

:root[data-theme="light"] {
  --bg: #f6f8fa;
  --bg-elevated: #ffffff;
  --border: #d0d7de;
  --text: #1f2328;
  --text-dim: #59636e;
  --accent: #0969da;
  --accent-2: #1a7f37;
  --danger: #cf222e;
  --warning: #9a6700;
  --purple: #8250df;
  --on-accent: #ffffff;
  --game-bg-1: #ffffff;
  --game-bg-2: #f6f8fa;
  --grid-line: rgba(31, 35, 40, 0.05);
  --overlay-bg: rgba(255, 255, 255, 0.88);
  --shadow: rgba(140, 149, 159, 0.3);
  --shadow-strong: rgba(140, 149, 159, 0.4);
  --accent-soft-bg: rgba(9, 105, 218, 0.1);
  --accent-soft-border: rgba(9, 105, 218, 0.35);
  --accent-glow: rgba(9, 105, 218, 0.2);
  --row-hover: rgba(31, 35, 40, 0.035);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  overflow-x: hidden;
}

body, .topbar, .tab-btn, .control select, .primary-btn, .secondary-btn,
.hud-item, .game-container, .snippet, .stat-card, .chart-card, .history-card,
.settings-card, th, td, .idle-overlay {
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.topbar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.brand {
  font-weight: 700;
  font-size: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.brand-icon { color: var(--accent); flex: 0 0 auto; }

/* margin-left:auto keeps this pinned to the right edge even when it wraps
   onto its own line on narrow screens, where justify-content:space-between
   has nothing left to space against. */
.topbar-actions { display: flex; align-items: center; gap: 14px; margin-left: auto; }

.tabs { display: flex; gap: 8px; }

.nav-toggle-btn { display: none; }

.tab-btn {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid transparent;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--text);
  background: var(--accent-soft-bg);
  border-color: var(--accent-soft-border);
}

main { max-width: 1100px; margin: 0 auto; padding: 20px 24px 60px; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 14px;
  margin-bottom: 16px;
}

.hidden { display: none; }

.quick-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 0 0 auto;
}
.quick-controls .control {
  flex-direction: row;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.quick-controls .control select {
  min-width: 0;
  width: 120px;
  padding: 6px 8px;
  font-size: 12px;
}
.quick-controls .control-slider {
  width: 180px;
}
.quick-controls .control-slider span { gap: 6px; }
.quick-controls .control-slider input[type="range"] { margin: 0; }

.play-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}
.setup-summary {
  color: var(--text-dim);
  font-size: 13px;
  flex: 0 1 auto;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.play-actions { display: flex; gap: 10px; flex: 0 0 auto; }

.hud-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.settings-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.settings-card h3 { margin: 0; font-size: 13px; color: var(--text-dim); font-weight: 500; }
.settings-card select { width: 100%; min-width: 0; }
.settings-row { display: flex; gap: 10px; }

.control { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--text-dim); }
.control select {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 13px;
  min-width: 180px;
}

.control-slider { min-width: 240px; }
.control-slider span { display: flex; align-items: baseline; gap: 8px; }
.control-slider strong { color: var(--accent); font-size: 13px; }
.control-slider em { font-style: normal; color: var(--text-dim); font-size: 11px; }

.control-slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  margin: 9px 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--warning), var(--danger));
  cursor: pointer;
}
.control-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text);
  border: 2px solid var(--bg-elevated);
  box-shadow: 0 0 0 1px var(--border);
}
.control-slider input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text);
  border: 2px solid var(--bg-elevated);
}
.control-slider input[type="range"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

button { font-family: inherit; }

.primary-btn {
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  padding: 9px 20px;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
}
.primary-btn:hover { filter: brightness(1.08); }
.primary-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.secondary-btn {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 9px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
.secondary-btn:hover { border-color: var(--accent); }
.secondary-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.secondary-btn.small { padding: 6px 12px; font-size: 12px; }

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  flex: 1 1 auto;
  min-width: 0;
}
.hud-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  display: flex;
  flex-direction: column;
  min-width: 84px;
}
.hud-label { font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); }
.hud-value { font-size: 18px; font-weight: 700; }

.game-container {
  position: relative;
  height: 480px;
  background: linear-gradient(180deg, var(--game-bg-1) 0%, var(--game-bg-2) 100%);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.game-container::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 25% 100%;
  pointer-events: none;
}

.lanes-layer {
  position: absolute;
  inset: 0;
}

/* Always-focused capture input: invisible, but a real focusable <input> so
   mobile browsers show the on-screen keyboard during a session. font-size
   16px avoids iOS Safari auto-zooming the page in on focus. */
.game-input-capture {
  position: fixed;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: 0;
  border: none;
  outline: none;
  opacity: 0;
  font-size: 16px;
  pointer-events: none;
  background: transparent;
  color: transparent;
  caret-color: transparent;
}

.ground-line {
  position: absolute;
  left: 0; right: 0;
  bottom: 40px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--danger) 0 10px, transparent 10px 20px);
  opacity: 0.6;
}

.snippet {
  position: absolute;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  white-space: nowrap;
  box-shadow: 0 2px 8px var(--shadow);
}
.snippet .typed { color: var(--accent-2); }
.snippet .rest { color: var(--text); }
.snippet.locked {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow), 0 2px 10px var(--shadow-strong);
}
.snippet.error-flash {
  border-color: var(--danger);
  animation: shake 0.15s;
}
@keyframes shake {
  0%, 100% { transform: translateX(-50%); }
  50% { transform: translateX(calc(-50% + 3px)); }
}

.idle-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  gap: 8px;
  background: var(--overlay-bg);
}
.idle-overlay.hidden { display: none; }
.idle-overlay .hint { color: var(--text-dim); font-size: 12px; max-width: 420px; }
#gameover-title, #mobile-banner-title { font-size: 20px; font-weight: 700; color: var(--accent); }

.countdown-number {
  font-size: 72px;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  margin: 0;
}
.countdown-number.countdown-pop {
  animation: countdown-pop 0.7s ease-out;
}
@keyframes countdown-pop {
  0% { transform: scale(0.4); opacity: 0; }
  35% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.mobile-link-row {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 380px;
}
.mobile-link-input {
  flex: 1 1 auto;
  min-width: 0;
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 10px;
  font-family: inherit;
  font-size: 12px;
}
.mobile-link-input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-value { font-size: 26px; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 12px; color: var(--text-dim); }

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}
.chart-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.chart-card h3 { margin: 0 0 10px; font-size: 13px; color: var(--text-dim); font-weight: 500; }
.chart-card canvas { width: 100%; height: 180px; display: block; }

.history-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
}
.history-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.history-header h3 { margin: 0; font-size: 13px; color: var(--text-dim); font-weight: 500; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--text-dim); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; }
tbody tr:hover { background: var(--row-hover); }

.site-footer {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: center;
}
.visitor-counter {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-dim);
}
.visitor-counter-label {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 11px;
}
.visitor-counter-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  line-height: 0;
  background: #fff;
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.visitor-counter-badge img { display: block; height: 18px; width: auto; }
.visitor-counter-badge br { display: none; }
.visitor-counter-credit { color: var(--text-dim); font-size: 11px; text-decoration: none; }
.visitor-counter-credit:hover { color: var(--accent); }

@media (max-width: 640px) {
  .game-container { height: 400px; }
  .controls { flex-direction: column; align-items: stretch; }
  .control select { min-width: 0; width: 100%; }
  .control-slider { min-width: 0; width: 100%; }
  .play-toolbar { flex-direction: column; align-items: stretch; }
  .play-actions { flex-wrap: wrap; }
  .setup-summary { white-space: normal; }
  .hud-row { flex-direction: column; align-items: stretch; }
  .quick-controls { flex-direction: column; align-items: stretch; }
  .quick-controls .control { flex-direction: column; align-items: stretch; }
  .quick-controls .control select { width: 100%; }
  .quick-controls .control-slider { width: 100%; }

  .brand { font-size: 15px; }
  .brand span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Collapse the tab row into a hamburger-triggered dropdown so it never
     has to squeeze "Play / Settings / Analytics" into a narrow topbar. */
  .nav-toggle-btn { display: inline-flex; align-items: center; justify-content: center; }
  .tabs {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 4px;
    padding: 8px 16px 14px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 20px var(--shadow);
    z-index: 20;
  }
  .tabs.open { display: flex; }
  .tab-btn { width: 100%; text-align: left; }

  .settings-grid { grid-template-columns: 1fr; }
  .chart-grid { grid-template-columns: 1fr; }
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
}