/* Chess ELO Estimator - Chess-themed dark UI */

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #1f2b47;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0b0;
  --accent: #d4a843;
  --accent-dim: #b8922f;
  --white-elo: #4fc3f7;
  --black-elo: #ef5350;
  --border: #2a3a5c;
}

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

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

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.badge {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 12px;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* Main layout */
.main-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 600px;
  margin: 0 auto;
}

/* Side panel */
.side-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Results panel */
.results-panel {
  background: var(--bg-card);
  border-radius: 8px;
  padding: 20px;
  border: 1px solid var(--border);
  opacity: 0.6;
  transition: opacity 0.3s;
}

.results-panel.has-results {
  opacity: 1;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
}

.result-row + .result-row {
  border-top: 1px solid var(--border);
}

.player-name {
  font-size: 1rem;
  color: var(--text-secondary);
}

.elo-value {
  font-size: 1.8rem;
  font-weight: 700;
  font-family: 'SF Mono', 'Consolas', monospace;
  color: var(--accent);
}

.result-row:first-child .elo-value {
  color: var(--white-elo);
}

.result-row:nth-child(2) .elo-value {
  color: var(--black-elo);
}

.result-detail {
  display: flex;
  justify-content: space-between;
  padding: 8px 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.header-info {
  margin-top: 8px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
}

/* Progress */
.progress-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.progress-bar-track {
  height: 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Input section */
.input-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-section label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  color: var(--text-primary);
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 0.8rem;
  resize: vertical;
  line-height: 1.5;
  transition: border-color 0.2s;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.5;
}

.input-actions {
  display: flex;
  gap: 8px;
}

/* Buttons */
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  flex: 1;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-dim);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
  color: var(--text-primary);
}

/* Footer */
footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}