:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --border: #2a2f3a;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #4ade80;
  --accent-dim: #22c55e;
  --white-piece: #f0f0f0;
  --black-piece: #333;
  --win: #4ade80;
  --draw: #fbbf24;
  --loss: #f87171;
  --pending: #64748b;
  --header: #12141a;
  --hover: #252a35;
  --rank1: #fbbf24;
  --rank2: #94a3b8;
  --rank3: #cd7f32;
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  background: var(--header);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  margin-bottom: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.subtitle {
  color: var(--muted);
  font-size: 0.9rem;
}

.progress-bar {
  background: var(--border);
  border-radius: 999px;
  height: 8px;
  width: 160px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.85rem;
  color: var(--muted);
}

nav {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.15s;
}

.tab-btn:hover {
  background: var(--hover);
  color: var(--text);
}

.tab-btn.active {
  background: var(--accent);
  color: #0f1115;
  border-color: var(--accent);
  font-weight: 600;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 0.65rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  user-select: none;
}

th:hover {
  color: var(--text);
}

tr:hover td {
  background: var(--hover);
}

.rank {
  font-weight: 700;
  width: 40px;
}

.rank-1 { color: var(--rank1); }
.rank-2 { color: var(--rank2); }
.rank-3 { color: var(--rank3); }

.score {
  font-weight: 700;
  color: var(--accent);
}

.elo {
  font-variant-numeric: tabular-nums;
}

.delta-pos { color: var(--win); }
.delta-neg { color: var(--loss); }
.delta-zero { color: var(--muted); }

.result-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  min-width: 48px;
  text-align: center;
}

.result-1-0 { background: rgba(74, 222, 128, 0.15); color: var(--win); }
.result-0-1 { background: rgba(248, 113, 113, 0.15); color: var(--loss); }
.result-1-2 { background: rgba(251, 191, 36, 0.15); color: var(--draw); }
.result-null { background: rgba(100, 116, 139, 0.2); color: var(--pending); }

.board-num {
  color: var(--muted);
  font-size: 0.8rem;
  width: 30px;
}

.round-section {
  margin-bottom: 1.5rem;
}

.round-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.round-title {
  font-weight: 600;
  font-size: 1rem;
}

.round-status {
  font-size: 0.8rem;
  color: var(--muted);
}

.game-row {
  display: grid;
  grid-template-columns: 40px 1fr auto 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 0.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
}

.game-row:hover {
  background: var(--hover);
}

.player-name {
  font-weight: 500;
}

.player-white::before {
  content: "♙ ";
  color: var(--white-piece);
}

.player-black::before {
  content: "♟ ";
  color: #888;
}

.vs {
  color: var(--muted);
  font-size: 0.85rem;
}

.form-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

select, input, button.primary {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}

select:focus, input:focus {
  outline: none;
  border-color: var(--accent);
}

button.primary {
  background: var(--accent);
  color: #0f1115;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 0.5rem;
}

button.primary:hover {
  background: var(--accent-dim);
}

button.primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-secondary:hover {
  background: var(--hover);
}

.status {
  font-size: 0.85rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  margin-top: 1rem;
}

.status.ok { background: rgba(74, 222, 128, 0.15); color: var(--win); }
.status.err { background: rgba(248, 113, 113, 0.15); color: var(--loss); }
.status.info { background: rgba(100, 116, 139, 0.2); color: var(--muted); }

.hidden { display: none !important; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.modal {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.5rem;
  width: 100%;
  max-width: 400px;
}

.modal h3 {
  margin-bottom: 1rem;
  color: var(--accent);
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.modal-actions button {
  flex: 1;
}

.loading {
  text-align: center;
  padding: 3rem;
  color: var(--muted);
}

.footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  .game-row {
    grid-template-columns: 30px 1fr;
    grid-template-rows: auto auto;
  }
  .game-row .result-badge {
    grid-column: 2;
  }
  th, td {
    padding: 0.5rem 0.4rem;
    font-size: 0.85rem;
  }
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Extra styles for new pairing cards & enter form */
.pairing-card {
  margin-bottom: 1rem;
}

.pairing-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.pairing-names {
  font-weight: 600;
  font-size: 1.05rem;
}

.pairing-status {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.pairing-status.complete {
  background: rgba(74, 222, 128, 0.15);
  color: var(--win);
}

.pairing-status.partial {
  background: rgba(251, 191, 36, 0.15);
  color: var(--draw);
}

.pairing-status.pending {
  background: rgba(100, 116, 139, 0.2);
  color: var(--pending);
}

.games-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.hint {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 0.75rem 0;
}

.enter-games {
  margin: 1rem 0;
  padding: 1rem;
  background: var(--bg);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.enter-games .form-group {
  margin-bottom: 1rem;
}

.enter-games .form-group:last-child {
  margin-bottom: 0;
}

.enter-games label {
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.4rem;
}