:root {
  --bg: #f3f6f9;
  --ink: #1f2a36;
  --accent: #0f9d8c;
  --cold: #2575fc;
  --humid: #1fbb70;
  --card: #ffffff;
  --line: #d7e0e8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top, #e9f4ff 0%, var(--bg) 45%);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
}
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px;
}
h1 { margin: 0; }
.subtitle { margin: 4px 0 20px; color: #5f6e7d; }
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}
.label { font-size: 13px; color: #6a7784; }
.value { font-size: 32px; font-weight: 700; margin-top: 6px; }
.value.small { font-size: 16px; font-weight: 500; }
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 14px;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
button {
  border: 0;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
}
.range-btn {
  background: #e7eef5;
  color: #28435e;
}
.range-btn.active {
  background: var(--accent);
  color: #fff;
}
.range-btn.disabled {
  opacity: 0.45;
}
.meta {
  color: #5f6e7d;
  font-size: 15px;
  margin-left: 4px;
}
canvas {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 300px;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-top: 12px;
  background: #fcfeff;
  touch-action: none;
}
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.stat-chip {
  background: #eef4fa;
  border: 1px solid var(--line);
  color: #23405c;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 15px;
}

@media (max-width: 640px) {
  .container {
    padding: 14px;
  }

  .panel {
    padding: 12px;
  }

  canvas {
    height: 300px;
  }
}