:root {
  --bg0: #0c1a24;
  --bg1: #143044;
  --ink: #e8f1f6;
  --muted: #9bb3c4;
  --min: #3b82f6;
  --avg: #22c55e;
  --max: #ef4444;
  --line: rgba(232, 241, 246, 0.12);
  --panel: rgba(8, 20, 30, 0.45);
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1e4a66 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #2a1f18 0%, transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, #0a141c);
}

.page {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.05;
}

.lede {
  margin: 0.5rem 0 1.25rem;
  color: var(--muted);
  max-width: 36rem;
}

.page-nav,
.view-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.page-nav {
  margin-bottom: 1rem;
}

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  padding: 0.55rem 0.95rem;
  border-radius: 0.35rem;
  font: inherit;
  cursor: pointer;
}

.btn:hover { border-color: rgba(232, 241, 246, 0.35); }

.btn.is-active {
  border-color: rgba(232, 241, 246, 0.45);
  background: rgba(232, 241, 246, 0.12);
}

.chart-panel {
  margin-top: 1.75rem;
  padding: 1rem 1rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.chart-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.65rem;
}

.chart-style-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.18);
}

.chart-style-btn {
  appearance: none;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
}

.chart-style-btn:last-child {
  border-right: 0;
}

.chart-style-btn:hover {
  color: var(--ink);
  background: rgba(232, 241, 246, 0.06);
}

.chart-style-btn.is-active {
  color: var(--ink);
  background: rgba(232, 241, 246, 0.12);
}

.year-heatmap {
  margin-top: 1.1rem;
  padding-top: 0;
  border-top: 1px solid var(--line);
}

.year-heatmap > .chart-range-nav,
.avg-duel > .chart-range-nav {
  margin-top: 0.85rem;
}

.year-heatmap-title {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.year-heatmap svg {
  display: block;
  width: 100%;
  height: auto;
}

.chart-range-nav {
  display: grid;
  grid-template-columns: 2.5rem 1fr 2.5rem;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.chart-nav-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.18);
  color: var(--ink);
  text-decoration: none;
  border-radius: 0.35rem;
  font: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.chart-nav-btn:hover {
  border-color: rgba(232, 241, 246, 0.35);
  background: rgba(232, 241, 246, 0.08);
}

.chart-nav-prev,
.chart-nav-next {
  font-size: 1.55rem;
  line-height: 1;
  padding: 0;
}

.chart-nav-current {
  justify-self: center;
  padding: 0.4rem 1rem;
  font-size: 0.95rem;
}

.status {
  color: var(--muted);
  font-size: 0.95rem;
}

.compare-notice {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.stats-panel {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.75rem;
}

.stat-card {
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: rgba(0, 0, 0, 0.12);
}

.stat-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.stat-value {
  margin: 0.35rem 0 0;
  font-size: 1.35rem;
  font-weight: 600;
}

.stats-chart {
  margin-top: 1rem;
}

.stats-chart-title {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.statistics-panel {
  margin-top: 1.75rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
}

.section-lede {
  margin: 0.45rem 0 1rem;
  color: var(--muted);
  max-width: 42rem;
}

.stats-table-wrap {
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.stats-table th,
.stats-table td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
  white-space: nowrap;
}

.stats-table th:first-child,
.stats-table td:first-child,
.stats-table th[scope="row"] {
  text-align: left;
}

.stats-table thead th {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stats-table tbody tr:hover {
  background: rgba(232, 241, 246, 0.04);
}

.statistics-panel .stats-chart canvas {
  display: block;
  width: 100% !important;
  max-height: 320px;
}

.chart-legend {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.legend-toggles {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.chart-range-label {
  margin: 0;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 500;
}

.swatch {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 0.2rem;
  display: inline-block;
}
.swatch.min { background: var(--min); }
.swatch.avg { background: var(--avg); }
.swatch.max { background: var(--max); }
.swatch.prev-band {
  background: rgba(148, 163, 184, 0.45);
  box-shadow: inset 0 0 0 1px rgba(203, 213, 225, 0.5);
}
.swatch.prev-line {
  background: transparent;
  border-top: 2px dashed #94a3b8;
  border-radius: 0;
  height: 0;
  width: 0.95rem;
  align-self: center;
}
.swatch.warmer { background: #f59e0b; }
.swatch.cooler { background: #38bdf8; }

.avg-duel {
  margin-top: 1.1rem;
  padding-top: 0;
  border-top: 1px solid var(--line);
}

.avg-duel-title {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.avg-duel canvas {
  display: block;
  width: 100% !important;
  max-height: 220px;
}

.avg-duel .avg-delta-chart {
  margin-top: 0.65rem;
  max-height: 120px;
}

.avg-duel-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin: 0.65rem 0 0.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.avg-duel-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-toggle {
  appearance: none;
  background: none;
  border: none;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.4rem;
  border-radius: 0.3rem;
}

.legend-toggle:hover { background: rgba(232, 241, 246, 0.08); }

.legend-toggle.is-hidden {
  opacity: 0.35;
}

.maintenance-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.maintenance-card {
  width: min(28rem, 100%);
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: var(--panel);
}

.maintenance-card h1 {
  margin: 0.4rem 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 500;
}

.admin-wrap {
  width: min(40rem, calc(100% - 2rem));
  margin: 2rem auto;
}

.admin-wrap h1 {
  font-family: var(--font-display);
  font-weight: 500;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.admin-table th,
.admin-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.55rem 0.35rem;
  text-align: left;
}

.admin-table input[type="number"] {
  width: 5.5rem;
  padding: 0.35rem 0.4rem;
  border-radius: 0.3rem;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
  color: var(--ink);
  font: inherit;
}

.flash {
  padding: 0.75rem 0.9rem;
  border-radius: 0.4rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
}

.flash.error {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.4);
}

.login-form {
  display: grid;
  gap: 0.75rem;
  max-width: 20rem;
}

.login-form input[type="password"] {
  padding: 0.55rem 0.7rem;
  border-radius: 0.35rem;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
  color: var(--ink);
  font: inherit;
}

@media (max-width: 640px) {
  .chart-panel { padding: 0.5rem; }
}