:root {
  --deep: #0b3d4c;
  --mid: #14708c;
  --surface: #eef5f5;
  --panel: #ffffff;
  --ink: #12242a;
  --muted: #5c7680;
  --accent: #d97a3c;
  --line: #d7e3e3;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
}

.lake-nav {
  background: #072933;
  padding: 6px 18px;
  display: flex;
  gap: 12px;
  border-bottom: 1px solid #145a70;
}

.lake-nav a {
  color: #9fc8d6;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.lake-nav a:hover {
  color: #ffffff;
  background: #145a70;
}

.lake-nav a.active {
  color: #ffffff;
  background: #1c6a82;
  font-weight: 600;
}

header#controls {
  top: 0;
  z-index: 10;
  background: var(--deep);
  color: #eef5f5;
  padding: 10px 18px 14px;
  display: flex;
  align-items: stretch;
  gap: 18px;
}

.header-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
}

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

.cfl-logo {
  height: 28px;
  width: auto;
  background-color: #ffffff;
  padding: 3px 6px;
  border-radius: 4px;
}

.header-buoy-info {
  margin: 0;
  font-size: 0.75rem;
  color: #cfe8ee;
  line-height: 1.35;
  max-width: 33vw;
  text-align: left;
}

.buoy-logo-wrap {
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
  border-radius: 8px;
}

.buoy-logo {
  position: absolute;
  inset: 0;
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.title-row h1 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.02em;
}

.status {
  font-size: 0.75rem;
  color: #9fc8d6;
}

.range-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: 6px 0 8px;
  font-size: 0.82rem;
}

.range-row input[type="date"] {
  background: #0e4a5c;
  border: 1px solid #1c6a82;
  color: #eef5f5;
  border-radius: 3px;
  padding: 2px 4px;
  font-size: 0.8rem;
}

.presets button {
  background: transparent;
  border: 1px solid #2a7f99;
  color: #cfe8ee;
  padding: 3px 9px;
  margin-right: 4px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 0.78rem;
}

.presets button:hover {
  background: #145a70;
}

.bin-note {
  margin-left: 10px;
  font-style: italic;
  color: #9fc8d6;
  font-size: 0.76rem;
}

.varToggles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.varToggles button {
  background: transparent;
  border: 1px solid #2a7f99;
  color: #9fc8d6;
  padding: 3px 9px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 0.76rem;
  transition: all 0.15s ease;
}

.varToggles button:hover {
  background: #145a70;
  color: #eef5f5;
}

.varToggles button.active {
  background: #1c6a82;
  border-color: #49a8c7;
  color: #ffffff;
  font-weight: 500;
}

main#charts {
  padding: 14px 18px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---------- Mini Cards ---------- */

.mini-cards-section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 14px;
}

.mini-cards-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.mini-cards-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--deep);
}

.mini-cards-timestamp {
  font-size: 0.76rem;
  color: var(--muted);
}

.mini-cards-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.mini-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 8px 10px;
  flex: 1 1 180px;
  min-width: 120px;
  max-width: 200px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mini-card-title {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--deep);
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}

.mini-card-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--deep);
}

.mini-card-grid-values {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
}

.mini-card-grid-item {
  display: flex;
  flex-direction: column;
}

.mini-card-grid-label {
  font-size: 0.65rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.mini-card-grid-val {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--deep);
}

/* ---------- Chart Panels ---------- */

.chart-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px 4px;
}

.chart-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2px;
}

.chart-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--deep);
}

.chart-sub {
  font-size: 0.72rem;
  color: var(--muted);
}

.unit-toggle {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.unit-toggle button {
  font-size: 0.7rem;
  border: 1px solid var(--mid);
  background: #fff;
  color: var(--mid);
  border-radius: 3px;
  padding: 1px 6px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.unit-toggle button.active {
  background: var(--mid);
  color: #fff;
}

.depth-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin: 4px 0 6px;
}

.depth-swatch {
  font-size: 0.65rem;
  padding: 1px 5px;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  color: #fff;
  opacity: 1;
}

.depth-swatch.off {
  opacity: 0.25;
  color: #333;
}

svg.chart {
  display: block;
  width: 100%;
  height: auto;
}

.axis path,
.axis line {
  stroke: #b9c9c9;
}

.axis text {
  fill: var(--muted);
  font-size: 10px;
}

.gridline {
  stroke: #eee;
}

.legend-line {
  fill: none;
  stroke-width: 1.4;
}

.hover-line {
  stroke: var(--accent);
  stroke-dasharray: 2, 2;
}

.tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(11, 61, 76, 0.95);
  color: #eef5f5;
  font-size: 0.72rem;
  padding: 4px 7px;
  border-radius: 4px;
  line-height: 1.4;
  white-space: nowrap;
}

footer {
  padding: 8px 18px 30px;
  font-size: 0.72rem;
  color: var(--muted);
  max-width: 760px;
}

@media (max-width: 700px) {
  .buoy-logo-wrap {
    display: none;
  }

  header#controls {
    align-items: flex-start;
  }

  .header-buoy-info {
    max-width: 100%;
  }
}