:root {
  --bg: #eef3f7;
  --fg: #1b2733;
  --accent: #6b7785;
  --water: #2f7bdb;
  --water-full: #1f9d55;
  --grid: rgba(0, 0, 0, 0.1);
  --row-hover: rgba(0, 0, 0, 0.03);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: "Open Sans", sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1rem;
}

a {
  color: var(--water);
}

/* ---------- Lake page ---------- */

.back-link {
  align-self: flex-start;
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: 1.5rem;
}

.back-link:hover {
  text-decoration: underline;
}

#tagline {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

#status {
  display: block;
  font-family: "Anton", sans-serif;
  font-weight: 400;
  font-size: clamp(3rem, 18vw, 8rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--water);
}

#status.full {
  color: var(--water-full);
}

#location {
  font-size: 1rem;
  color: var(--accent);
  margin-top: 0.25rem;
}

#percent {
  font-size: 1.3rem;
  font-weight: 800;
  margin-top: 0.75rem;
}

#timestamp {
  font-size: 0.85rem;
  color: var(--accent);
  margin-top: 0.25rem;
}

.chart-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 2rem;
}

.chart-controls button {
  font-family: "Open Sans", sans-serif;
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
}

.chart-controls button.active {
  background: var(--water);
  border-color: var(--water);
  color: #fff;
}

.chart-wrap {
  position: relative;
  width: min(90vw, 640px);
  margin-top: 1rem;
}

#chart {
  width: 100%;
  height: auto;
  display: block;
  cursor: crosshair;
}

#chart-tooltip {
  position: absolute;
  display: none;
  pointer-events: none;
  background: var(--fg);
  color: var(--bg);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.3rem 0.55rem;
  border-radius: 4px;
  white-space: nowrap;
  z-index: 5;
}

.chart-fill {
  fill: var(--water);
  fill-opacity: 0.18;
}

.chart-line {
  fill: none;
  stroke: var(--water);
  stroke-width: 2;
}

.chart-grid line {
  stroke: var(--grid);
  stroke-width: 1;
}

.chart-grid text {
  fill: var(--accent);
  font-size: 9px;
  font-family: "Open Sans", sans-serif;
}

.chart-dot {
  fill: var(--water);
}

.chart-hover-line {
  stroke: var(--accent);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}

.chart-hover-dot {
  fill: #fff;
  stroke: var(--water);
  stroke-width: 2;
}

/* ---------- Directory page ---------- */

body.directory {
  justify-content: flex-start;
  padding-top: 3rem;
}

body.directory h1 {
  font-family: "Anton", sans-serif;
  font-weight: 400;
  font-size: clamp(2rem, 8vw, 3.5rem);
  margin: 0;
}

.subhead {
  color: var(--accent);
  margin-top: 0.25rem;
  margin-bottom: 2rem;
}

#lakes-table {
  width: min(94vw, 720px);
  border-collapse: collapse;
  font-size: 0.9rem;
}

#lakes-table th,
#lakes-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--grid);
  text-align: right;
}

#lakes-table td.left,
#lakes-table th:first-child {
  text-align: left;
}

#lakes-table th {
  color: var(--accent);
  font-weight: 800;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

#lakes-table th.sorted::after {
  content: " \25BE";
}

#lakes-table th.sorted[data-dir="asc"]::after {
  content: " \25B4";
}

#lakes-table tbody tr:hover {
  background: var(--row-hover);
}

#lakes-table a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 800;
}

#lakes-table a:hover {
  text-decoration: underline;
}

#lakes-table td.full {
  color: var(--water-full);
  font-weight: 800;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10161d;
    --fg: #eef3f7;
    --accent: #8b98a6;
    --grid: rgba(255, 255, 255, 0.12);
    --row-hover: rgba(255, 255, 255, 0.04);
  }
}