:root {
  --turquoise: #1abc9c;
  --green-sea: #16a085;
  --emerald: #2ecc71;
  --nephritis: #27ae60;
  --peter-river: #3498db;
  --belize-hole: #2980b9;
  --amethyst: #9b59b6;
  --wisteria: #8e44ad;
  --wet-asphalt: #34495e;
  --midnight-blue: #2c3e50;
  --sun-flower: #f1c40f;
  --orange: #f39c12;
  --carrot: #e67e22;
  --pumpkin: #d35400;
  --alizarin: #e74c3c;
  --pomegranate: #c0392b;
  --clouds: #ecf0f1;
  --silver: #bdc3c7;
  --concrete: #95a5a6;
  --asbestos: #7f8c8d;

  color-scheme: dark;
}

html[data-theme="dark"] {
  --bg: #2c3e50;
  --card: #34495e;
  --card-2: #2f4254;
  --text: #ecf0f1;
  --muted: #bdc3c7;
  --border: rgba(236, 240, 241, 0.14);
  --input-bg: #2c3e50;
  --accent: #1abc9c;
  --accent-2: #3498db;
  --ok: #2ecc71;
  --bad: #e74c3c;
  --shadow: 0 14px 34px rgba(0, 0, 0, 0.22);

  color-scheme: dark;
}

html[data-theme="light"] {
  --bg: #ecf0f1;
  --card: #ffffff;
  --card-2: #f8fafb;
  --text: #2c3e50;
  --muted: #7f8c8d;
  --border: rgba(44, 62, 80, 0.14);
  --input-bg: #ffffff;
  --accent: #16a085;
  --accent-2: #2980b9;
  --ok: #27ae60;
  --bad: #c0392b;
  --shadow: 0 12px 30px rgba(44, 62, 80, 0.10);

  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(26, 188, 156, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(52, 152, 219, 0.12), transparent 28%),
    var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.page {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 20px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

h1 {
  margin: 0 0 4px;
  font-size: clamp(24px, 4vw, 36px);
  letter-spacing: -0.04em;
}

h2 {
  margin: 0 0 4px;
  font-size: 18px;
}

p {
  margin: 0;
  color: var(--muted);
}

.hidden {
  display: none !important;
}

.theme-toggle {
  color: var(--muted);
  white-space: nowrap;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.card,
.panel,
.chart-card {
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.card {
  padding: 16px;
}

.card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 700;
}

.badge {
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(52, 152, 219, 0.16);
  color: var(--peter-river);
}

.badge.ok {
  background: rgba(46, 204, 113, 0.16);
  color: var(--ok);
}

.badge.bad {
  background: rgba(231, 76, 60, 0.16);
  color: var(--bad);
}

.metric {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}

.metric span:first-child {
  color: var(--muted);
}

.metric strong {
  text-align: right;
}

.panel {
  padding: 16px;
  margin-bottom: 16px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(150px, 1fr));
  gap: 12px;
  align-items: end;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

input,
select,
button {
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 0 12px;
  font: inherit;
  background: var(--input-bg);
  color: var(--text);
}

input[type="checkbox"] {
  padding: 0;
  accent-color: var(--turquoise);
}

button {
  cursor: pointer;
  background: var(--turquoise);
  color: #ffffff;
  border: none;
  font-weight: 700;
}

button:hover {
  opacity: 0.92;
}

button:disabled,
input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.toggle-control {
  display: inline-flex;
  grid-template-columns: none;
  align-items: center;
  gap: 8px;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.toggle-control input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.toggle-slider {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex: 0 0 44px;
  border-radius: 999px;
  background: var(--asbestos);
  transition: background 0.18s ease;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.22);
  transition: transform 0.18s ease;
}

.toggle-control input:checked + .toggle-slider {
  background: var(--turquoise);
}

.toggle-control input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

.toggle-control input:focus-visible + .toggle-slider {
  outline: 3px solid rgba(26, 188, 156, 0.35);
  outline-offset: 3px;
}

.chart-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.chart-card {
  padding: 16px;
  min-height: 420px;
  margin-bottom: 10px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.chart-tools {
  display: grid;
  grid-template-columns: minmax(220px, 1.2fr) minmax(320px, 2fr);
  gap: 12px;
  margin-bottom: 28px;
}

fieldset {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
}

legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 13px;
}

.series-selector {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.series-selector label,
.inline-check {
  display: inline-flex;
  grid-template-columns: none;
  align-items: center;
  gap: 7px;
  color: var(--text);
  white-space: nowrap;
}

.series-selector input {
  width: 16px;
  height: 16px;
}

.scale-controls {
  display: grid;
  grid-template-columns: auto minmax(100px, 1fr) minmax(100px, 1fr) auto;
  align-items: center;
  gap: 10px;
}

.scale-controls input[type="number"] {
  width: 100%;
}

canvas {
  width: 100% !important;
  height: 300px !important;
}

@media (max-width: 1100px) {
  .cards {
    grid-template-columns: repeat(2, minmax(150px, 1fr));
  }

  .controls {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
  }

  .chart-tools {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .page {
    padding: 12px;
  }

  .header {
    align-items: flex-start;
    flex-direction: column;
  }

  .cards,
  .controls {
    grid-template-columns: 1fr;
  }

  .chart-card {
    min-height: 360px;
  }

  .scale-controls {
    grid-template-columns: 1fr;
  }

  .inline-check {
    justify-content: flex-start;
  }

  canvas {
    height: 260px !important;
  }
}