/* MatchProb — Tennis match probability calculator */

:root {
  --bg: #111;
  --surface: #1a1a2e;
  --surface2: #16213e;
  --text: #e0e0e0;
  --text-dim: #888;
  --accent: #2ecc71;
  --accent2: #e74c3c;
  --border: #333;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}

.tabs {
  display: flex;
  gap: 0;
  justify-content: center;
}

.tab {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 0.5rem 1.5rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.tab:first-child { border-radius: 6px 0 0 6px; }
.tab:last-child { border-radius: 0 6px 6px 0; }
.tab.active { background: var(--accent); color: #000; font-weight: 600; border-color: var(--accent); }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
}

/* Controls / sidebar */
.controls {
  background: var(--surface);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 1rem;
}

.controls h3 {
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.control-row {
  margin-bottom: 0.6rem;
}

.control-row label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.val {
  color: var(--accent);
  font-weight: 600;
  min-width: 2.5em;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin-top: 0.2rem;
}

select {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.4rem;
  font-size: 0.85rem;
  width: 100%;
}

input[type="number"] {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.3rem 0.4rem;
  font-size: 0.9rem;
  width: 3rem;
  text-align: center;
}

input[type="checkbox"] {
  accent-color: var(--accent);
}

/* Match info */
.match-info {
  background: var(--surface);
  border-radius: 8px;
  padding: 0.8rem;
  margin: 0.8rem 0;
  font-size: 0.85rem;
  line-height: 1.5;
}

/* Score display */
.score-box {
  background: var(--surface2);
  border-radius: 8px;
  padding: 0.8rem;
  margin: 0.8rem 0;
  text-align: center;
}

.score {
  font-size: 1.1rem;
  font-weight: 600;
  font-family: 'Courier New', monospace;
}

.point-num, .last-point {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

/* Probability display */
.prob-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0.8rem 0;
}

.prob-cell {
  text-align: center;
  min-width: 5rem;
}

.prob-cell .p1 { color: var(--accent); font-size: 0.8rem; }
.prob-cell .p2 { color: var(--accent2); font-size: 0.8rem; }
.prob-cell strong { display: block; font-size: 1.2rem; }

.prob-bar-container {
  flex: 1;
  height: 12px;
  background: var(--accent2);
  border-radius: 6px;
  overflow: hidden;
}

.prob-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 6px 0 0 6px;
  transition: width 0.2s;
}

/* Slider */
.slider-row {
  margin: 0.5rem 0;
}

.slider-row input[type="range"] {
  width: 100%;
}

/* Chart */
.chart-toggles {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
}

.chart-container {
  width: 100%;
  height: 280px;
  background: var(--surface);
  border-radius: 8px;
  overflow: hidden;
}

.chart-container canvas {
  width: 100%;
  height: 100%;
}

/* Stats */
.stats-row {
  display: flex;
  gap: 1rem;
  margin-top: 0.8rem;
}

.stat {
  flex: 1;
  background: var(--surface);
  border-radius: 8px;
  padding: 0.6rem;
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}

.stat span:last-child {
  font-size: 1rem;
  font-weight: 600;
}

/* Manual mode */
.manual-grid-inputs {
  background: var(--surface);
  border-radius: 8px;
  padding: 1rem;
}

.score-inputs {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.score-inputs > div { flex: 1; min-width: 5rem; }
.score-inputs label { display: block; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 0.3rem; }

.input-pair {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.input-pair span { color: var(--text-dim); }

.manual-prob {
  margin: 1rem 0;
  text-align: center;
}

.prob-display {
  display: flex;
  justify-content: center;
  gap: 2rem;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.prob-display .p1 { color: var(--accent); }
.prob-display .p2 { color: var(--accent2); }

/* Grid table */
.grid-table {
  border-collapse: collapse;
  margin: 0.5rem auto;
  font-size: 0.8rem;
}

.grid-table th, .grid-table td {
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  text-align: center;
}

.grid-table th {
  background: var(--surface2);
  font-weight: 600;
}

.grid-table td.na {
  color: var(--text-dim);
  background: var(--surface);
}

h3 {
  font-size: 0.95rem;
  color: var(--accent);
  margin: 1rem 0 0.5rem;
  text-align: center;
}

/* About */
.about-content {
  background: var(--surface);
  border-radius: 8px;
  padding: 1.5rem;
  line-height: 1.7;
  font-size: 0.9rem;
}

.about-content h2 {
  color: var(--accent);
  font-size: 1.3rem;
  margin-bottom: 1rem;
  text-align: center;
}

.about-content h3 {
  text-align: left;
  margin-top: 1.5rem;
}

.about-content p {
  margin-bottom: 0.8rem;
}

.about-content ul {
  margin: 0.5rem 0 1rem 1.2rem;
}

.about-content li {
  margin-bottom: 0.4rem;
}

.about-content a {
  color: var(--accent);
  text-decoration: none;
}

.about-content a:hover {
  text-decoration: underline;
}

.math {
  background: var(--surface2);
  border-left: 3px solid var(--accent);
  padding: 0.8rem 1rem;
  margin: 1rem 0;
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  overflow-x: auto;
}

.about-note {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
}

.about-links {
  margin-top: 1rem;
  text-align: center;
}

.about-links a {
  display: inline-block;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
  main { padding: 0.5rem; }
  .prob-row { flex-direction: column; }
  .prob-cell { min-width: auto; }
  .stats-row { flex-direction: column; }
  .score-inputs { flex-direction: column; }
  .chart-container { height: 220px; }
}