:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-header: #f1f5f9;
  --bg-row-hover: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --accent-primary: #111827;
  --accent-highlight: #f59e0b;
  --accent-highlight-bg: #fef3c7;
  --accent-highlight-text: #92400e;
  --countdown-bg: #f1f5f9;
  --countdown-text: #0f172a;
  --countdown-active-bg: #ecfdf5;
  --countdown-active-text: #065f46;
  --row-height: 56px;
  --radius-lg: 12px;
  --radius-md: 8px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-height: 100vh;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-badge {
  background-color: var(--accent-primary);
  color: var(--accent-highlight);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  padding: 8px 14px;
  border-radius: var(--radius-md);
}

.brand h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.stats-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.stat-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.stat-pill strong {
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

/* Controls & Search */
.controls-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  background: var(--bg-card);
  padding: 14px 16px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.search-wrapper {
  position: relative;
  flex: 1 1 340px;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 10px 38px 10px 42px;
  font-size: 0.95rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-page);
  color: var(--text-primary);
  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.search-input:focus {
  outline: none;
  background-color: var(--bg-card);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
}

.clear-btn {
  position: absolute;
  right: 10px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}

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

.day-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-page);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-chip:hover {
  color: var(--text-primary);
  border-color: #cbd5e1;
}

.filter-chip.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

/* Table Card & Viewport */
.table-card {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 480px;
}

.table-viewport {
  height: calc(100vh - 230px);
  min-height: 460px;
  overflow-y: auto;
  overflow-x: auto;
  scroll-behavior: auto;
}

.athletes-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  min-width: 960px;
}

.athletes-table thead th {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: var(--bg-header);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  user-select: none;
}

.athletes-table tbody tr.athlete-row {
  height: var(--row-height);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.1s ease;
}

.athletes-table tbody tr.athlete-row:hover {
  background-color: var(--bg-row-hover);
}

.athletes-table td {
  padding: 0 16px;
  height: var(--row-height);
  font-size: 0.9rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: middle;
}

.spacer-row {
  border: none !important;
  padding: 0 !important;
}

.spacer-row td {
  padding: 0 !important;
  border: none !important;
  height: 0;
}

/* Column widths */
.col-name { width: 24%; }
.col-nat { width: 8%; }
.col-bib { width: 9%; }
.col-age { width: 9%; }
.col-day { width: 10%; }
.col-wave { width: 16%; }
.col-start { width: 12%; }
.col-countdown { width: 12%; text-align: right; }

.athletes-table thead th.col-countdown,
.athletes-table tbody td.col-countdown {
  text-align: right;
}

/* Badges and Typography inside cells */
.athlete-name {
  font-weight: 600;
  color: var(--text-primary);
}

.nat-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 4px;
  background-color: #f1f5f9;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.bib-number {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.day-badge {
  display: inline-block;
  padding: 3px 9px;
  font-size: 0.78rem;
  font-weight: 600;
  border-radius: 999px;
}

.day-thursday {
  background-color: #f3e8ff;
  color: #6b21a8;
}

.day-friday {
  background-color: #dcfce7;
  color: #166534;
}

.day-saturday {
  background-color: var(--accent-highlight-bg);
  color: var(--accent-highlight-text);
}

.day-sunday {
  background-color: #e0f2fe;
  color: #0369a1;
}

.start-datetime {
  font-size: 0.84rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.countdown-badge {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.84rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 4px 10px;
  border-radius: 6px;
  background-color: var(--countdown-bg);
  color: var(--countdown-text);
}

.countdown-badge.started {
  background-color: var(--countdown-active-bg);
  color: var(--countdown-active-text);
}

/* Loading Overlay */
.loading-overlay {
  position: absolute;
  inset: 0;
  z-index: 25;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: opacity 0.25s ease;
}

.loading-overlay[hidden] {
  display: none;
}

.loader-spinner {
  width: 42px;
  height: 42px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-right-color: var(--accent-highlight);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

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

.loading-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Empty State */
.empty-state {
  padding: 64px 20px;
  text-align: center;
}

.empty-state[hidden] {
  display: none;
}

.empty-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.empty-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
}