:root {
  --blue: #0b5ea8;
  --blue-dark: #073d70;
  --bg: #f4f7fa;
  --panel-bg: #ffffff;
  --border: #dbe3ea;
  --text: #1c2733;
  --muted: #64748b;
  --danger: #c0392b;
  --success: #1e8a52;
  --radius: 10px;
  --hover-bg: #eef4fa;
  --selected-bg: #e2f0ff;
  --info-bg: #f0f6fb;
  --row-hover-bg: #f8fbfe;
  --modal-overlay: rgba(15, 23, 42, 0.45);
  --modal-bg: #ffffff;
  --topbar-from: #0b5ea8;
  --topbar-to: #073d70;
}

[data-theme="dark"] {
  --blue: #4da3ff;
  --blue-dark: #7cc0ff;
  --bg: #10161d;
  --panel-bg: #1a222c;
  --border: #2b3641;
  --text: #e6edf3;
  --muted: #93a1b0;
  --danger: #e5534b;
  --success: #3fb87f;
  --hover-bg: #212b36;
  --selected-bg: #1f3a54;
  --info-bg: #1c2733;
  --row-hover-bg: #1c2530;
  --modal-overlay: rgba(0, 0, 0, 0.6);
  --modal-bg: #1a222c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.muted { color: var(--muted); }
.small { font-size: 0.85em; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, var(--topbar-from), var(--topbar-to));
  color: white;
  padding: 14px 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.topbar-title { display: flex; align-items: center; gap: 12px; }
.topbar-title .logo { font-size: 1.8em; }
.topbar-title h1 { margin: 0; font-size: 1.2em; }
.topbar-title p { margin: 0; color: #d7e6f5; }

.topbar-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.tabs { display: flex; gap: 8px; }
.tab-btn {
  background: rgba(255,255,255,0.12);
  border: none;
  color: white;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.95em;
}
.tab-btn.active { background: var(--panel-bg); color: var(--blue); font-weight: 600; }

.theme-toggle {
  background: rgba(255,255,255,0.12);
  border: none;
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.theme-toggle:hover { background: rgba(255,255,255,0.22); }

main { padding: 20px; max-width: 1200px; margin: 0 auto; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.banner {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}
.banner-warning { background: #fff4dd; border: 1px solid #f0c674; color: #7a5b00; }

.layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  align-items: start;
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 10px;
  flex-wrap: wrap;
}
.panel-header h2 { margin: 0; font-size: 1.05em; }

.filters-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.filters-row input, .filters-row select {
  flex: 1;
  min-width: 120px;
}

input, select, textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95em;
  font-family: inherit;
  background: var(--panel-bg);
  color: var(--text);
}

.checkbox-label { display: flex; align-items: center; gap: 6px; font-size: 0.9em; }

.btn {
  background: var(--blue);
  color: white;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95em;
}
.btn:hover { background: var(--blue-dark); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-small { padding: 6px 12px; font-size: 0.85em; }
.btn-ghost { background: transparent; color: var(--blue-dark); border: 1px solid var(--border); }
.btn-danger { background: var(--danger); }

.swimmer-list { display: flex; flex-direction: column; gap: 4px; max-height: 65vh; overflow-y: auto; }
.swimmer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
}
.swimmer-row:hover { background: var(--hover-bg); }
.swimmer-row.selected { background: var(--selected-bg); border-color: var(--blue); }
.swimmer-row .name { font-weight: 600; }
.swimmer-row .sub { font-size: 0.8em; color: var(--muted); }

.compare-row { gap: 10px; }
.compare-row input.compare-checkbox { width: 16px; height: 16px; flex-shrink: 0; accent-color: var(--blue); }

.empty-state { color: var(--muted); text-align: center; padding: 60px 20px; }

.chart-wrap { margin-bottom: 16px; }

.results-table { width: 100%; border-collapse: collapse; font-size: 0.9em; }
.results-table th, .results-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.results-table th { color: var(--muted); font-weight: 600; font-size: 0.85em; }
.results-table tbody tr:hover { background: var(--row-hover-bg); }

.form-row { margin-bottom: 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.form-row input[type="search"], .form-row input[type="text"] { flex: 1; min-width: 220px; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 14px;
}
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85em; color: var(--muted); }
.form-grid input, .form-grid select { color: var(--text); font-size: 1em; }

.info-box {
  background: var(--info-bg);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 0.9em;
}
.info-box.small { font-size: 0.85em; }

.search-results { display: flex; flex-direction: column; gap: 4px; max-height: 240px; overflow-y: auto; }
.search-result-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}
.search-result-row:hover { background: var(--hover-bg); }

.modal {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal[hidden] {
  display: none;
}
.modal-box {
  background: var(--modal-bg);
  border-radius: var(--radius);
  padding: 20px;
  width: 340px;
  max-width: 90vw;
}
.modal-box h3 { margin-top: 0; }
.modal-box input { width: 100%; margin: 10px 0; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 10px; }
.modal-box-wide { width: 560px; max-height: 85vh; overflow-y: auto; }

.results-table tbody tr.clickable-row { cursor: pointer; }
.split-row-own td { background: var(--selected-bg); font-weight: 600; }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #1c2733;
  color: white;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.9em;
  z-index: 100;
}
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }

.cat-row input { width: 100%; }