:root {
  color-scheme: light dark;
  --bg: #fafaf7;
  --fg: #1c1c1c;
  --muted: #6a6a6a;
  --accent: #1e6091;
  --good: #146c2e;
  --row-alt: #f1efe9;
  --border: #d8d4cb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181a;
    --fg: #e6e6e6;
    --muted: #9a9a9a;
    --accent: #5eb6ff;
    --good: #4fcf6f;
    --row-alt: #1f2326;
    --border: #2a2f33;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  overflow-x: hidden;
}

.page-top {
  position: relative;
}

.page-wave {
  position: absolute;
  top: -2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: calc(100% + 2rem);
  z-index: -1;
  fill: var(--accent);
  opacity: 0.06;
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  .page-wave { opacity: 0.10; }
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header h1 {
  margin: 0 0 0.25rem;
  font-size: 1.75rem;
}

.tagline {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.controls:not([hidden]) {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: end;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.controls label {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
  gap: 0.25rem;
}

.controls .checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: var(--fg);
  padding-bottom: 0.4rem;
}

.controls select,
.controls button {
  font: inherit;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
}

.controls button {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.controls button:hover { filter: brightness(1.1); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

#results .status {
  color: var(--muted);
  font-style: italic;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

caption {
  text-align: left;
  font-size: 0.85rem;
  color: var(--muted);
  padding: 0 0 0.5rem;
}

th, td {
  padding: 0.55rem 0.6rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}

th.sortable { padding: 0; }

.sort-button {
  font: inherit;
  text-transform: inherit;
  letter-spacing: inherit;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0.55rem 0.6rem;
  width: 100%;
  text-align: left;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.sort-button:hover { color: var(--fg); }

th[aria-sort="ascending"] .sort-button,
th[aria-sort="descending"] .sort-button { color: var(--fg); }

.sort-indicator {
  font-size: 0.7em;
  color: var(--accent);
}

tbody tr:nth-child(even) { background: var(--row-alt); }

tbody tr.row-negative {
  background: color-mix(in oklch, var(--bg), var(--good) 10%);
}
tbody tr.row-negative:nth-child(even) {
  background: color-mix(in oklch, var(--row-alt), var(--good) 12%);
}

.score-cell {
  font-weight: 600;
  color: color-mix(in oklch, var(--muted), var(--accent) calc(var(--score-pct, 1) * 100%));
}
.height-negative { color: var(--good); font-weight: 600; }
.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.tag + .tag { margin-left: 0.35rem; }

.tag-very-low {
  background: var(--good);
  color: var(--bg);
}

.tag-negative {
  background: color-mix(in oklch, var(--bg), var(--good) 18%);
  color: var(--good);
  border: 1px solid color-mix(in oklch, var(--bg), var(--good) 35%);
  padding: 1px 7px;
}

.tag-weekend {
  background: var(--accent);
  color: var(--bg);
}

.tag-outside {
  background: var(--row-alt);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 1px 7px;
}

a.home-link,
a.home-link:visited {
  color: inherit;
  text-decoration: none;
}
a.home-link:hover { color: var(--accent); }

a.date-link,
a.date-link:visited {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px dashed var(--border);
}
a.date-link:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.day-back {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}
.day-back a,
.day-back a:visited {
  color: var(--accent);
  text-decoration: none;
}
.day-back a:hover { text-decoration: underline; }

.day-title {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
}

.day-subtitle {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.sun-info {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}
.sun-info-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.sun-info-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.sun-info-value {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.tide-curve {
  margin-bottom: 1.5rem;
}
.tide-curve-svg {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
}
.tide-curve-daylight {
  fill: color-mix(in oklch, var(--bg), #f5c451 22%);
  opacity: 0.55;
}
@media (prefers-color-scheme: dark) {
  .tide-curve-daylight {
    fill: color-mix(in oklch, var(--bg), #f5c451 14%);
    opacity: 0.45;
  }
}
.tide-curve-area {
  fill: color-mix(in oklch, var(--bg), var(--accent) 25%);
  opacity: 0.55;
}
.tide-curve-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.2;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}
.tide-curve-tick {
  font-size: 6px;
  fill: var(--muted);
}
.tide-curve-event {
  stroke: var(--bg);
  stroke-width: 0.8;
}
.tide-curve-event-h { fill: var(--accent); }
.tide-curve-event-l { fill: var(--good); }
.tide-curve-event-label {
  font-size: 6px;
  fill: var(--fg);
  font-variant-numeric: tabular-nums;
}

.day-events,
.score-breakdown {
  margin-bottom: 1.5rem;
}
.day-events h3,
.score-breakdown h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.score-breakdown-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.75rem;
}
.score-breakdown-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}
.score-breakdown-time {
  font-weight: 500;
}
.score-breakdown-total {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
}
.score-breakdown-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(5rem, auto) 1fr auto;
  row-gap: 0.4rem;
  column-gap: 0.75rem;
  align-items: center;
  font-size: 0.9rem;
}
.score-breakdown-list li {
  display: contents;
}
.score-breakdown-label {
  color: var(--muted);
}
.score-breakdown-bar {
  display: block;
  height: 6px;
  background: var(--row-alt);
  border-radius: 999px;
  overflow: hidden;
}
.score-breakdown-bar-fill {
  display: block;
  height: 100%;
  background: var(--accent);
}
.score-breakdown-value {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  font-size: 0.8rem;
}
.score-breakdown-note {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: -0.2rem;
  padding-left: 0.1rem;
}