/* ===== Chess.com Player Explorer - Theme: Dark board + cream & gold ===== */
:root {
  --bg-dark: #0f1419;
  --bg-card: #1a2332;
  --bg-card-hover: #222d3f;
  --border: #2d3a4d;
  --text: #e8e6e3;
  --text-muted: #8b9cad;
  --accent: #c9a227;
  --accent-dim: #9a7b1a;
  --accent-glow: rgba(201, 162, 39, 0.25);
  --success: #5a9a6e;
  --danger: #c75c5c;
  --radius: 10px;
  --radius-sm: 6px;
  --font-sans: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ----- Header ----- */
.header {
  background: linear-gradient(135deg, var(--bg-card) 0%, #15202b 100%);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 2.25rem;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.logo h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.tagline {
  margin: 0.35rem 0 0 3rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ----- Main ----- */
.main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem 2rem;
  width: 100%;
}

/* ----- Cards ----- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.card h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ----- Source section ----- */
.source-row {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 1.25rem;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .source-row {
    grid-template-columns: 1fr;
  }
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.input-group textarea,
.input-group input[type="text"],
.input-group input[type="number"],
.input-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: border-color var(--transition);
}

.input-group textarea {
  resize: vertical;
  min-height: 80px;
}

.input-group select[multiple] {
  min-height: 100px;
}

.input-group input::placeholder,
.input-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}

.input-group input:focus,
.input-group textarea:focus,
.input-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.range-inputs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.range-inputs input {
  flex: 1;
  min-width: 0;
}

.range-inputs span {
  color: var(--text-muted);
}

.hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0.35rem 0 0;
}

.country-source-group .label-inline {
  display: block;
  margin-top: 0.75rem;
  margin-bottom: 0.35rem;
}

.extract-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.extract-row input[type="number"] {
  width: 5rem;
  padding: 0.5rem 0.5rem;
}

.hint-inline {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), opacity var(--transition);
}

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

.btn-primary {
  background: var(--accent);
  color: #0f1419;
}

.btn-primary:hover:not(:disabled) {
  background: #d4af37;
  box-shadow: 0 0 12px var(--accent-glow);
}

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

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.btn-loader {
  display: none;
  width: 1rem;
  height: 1rem;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.btn.loading .btn-text {
  visibility: hidden;
}

.btn.loading .btn-loader {
  display: block;
  position: absolute;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ----- Filters grid ----- */
.filters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.filter-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.filter-group input,
.filter-group select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  font-size: 0.875rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
}

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

.filter-actions {
  margin-top: 0.5rem;
}

/* ----- Toolbar ----- */
.toolbar-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.sort-group label,
.export-group {
  margin-right: 0.5rem;
}

.sort-group select {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  min-width: 240px;
}

.export-group {
  display: flex;
  gap: 0.5rem;
}

.results-summary {
  width: 100%;
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ----- Charts ----- */
.charts-card canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.chart-wrap {
  background: var(--bg-dark);
  border-radius: var(--radius-sm);
  padding: 1rem;
  border: 1px solid var(--border);
}

.chart-wrap canvas {
  width: 100%;
  height: 220px;
  display: block;
}

.chart-wrap.chart-full canvas {
  height: 260px;
}

.chart-wrap.chart-full {
  grid-column: 1 / -1;
}

@media (max-width: 900px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

/* ----- Table ----- */
.table-card {
  padding: 0;
  overflow: hidden;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.data-table th,
.data-table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-dark);
  white-space: nowrap;
}

.data-table tbody tr:hover {
  background: var(--bg-card-hover);
}

.data-table tbody tr.empty-row td {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem;
}

.data-table .avatar-cell {
  width: 40px;
}

.data-table .avatar-cell img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.data-table .username-cell a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.data-table .username-cell a:hover {
  text-decoration: underline;
}

.data-table .rating-cell {
  font-family: var(--font-mono);
  font-weight: 500;
}

.data-table .num-cell {
  font-family: var(--font-mono);
  text-align: right;
}

.data-table .consistency-cell {
  font-size: 0.8rem;
}

.consistency-high {
  color: var(--success);
}

.consistency-low {
  color: var(--danger);
}

/* ----- Pagination ----- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

#page-info {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.page-size {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.page-size select {
  padding: 0.35rem 0.5rem;
  font-size: 0.85rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
}

/* ----- Footer ----- */
.footer {
  padding: 1rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

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

/* ----- Utility ----- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}