:root {
  color-scheme: light;
  --page-bg: #f4f7f2;
  --card-bg: #ffffff;
  --text: #16202a;
  --muted: #5b6775;
  --border: #d4ddd2;
  --shadow: 0 16px 40px rgba(20, 33, 52, 0.08);
  --accent: #2f7de1;
  --accent-soft: #edf5ff;
  --bike-green: #dff1df;
  --panel-tint: #f8fbf6;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background:
    radial-gradient(circle at top left, #edf7ec 0%, transparent 34%),
    radial-gradient(circle at top right, #eef5ff 0%, transparent 28%),
    linear-gradient(180deg, #f8fbf6 0%, var(--page-bg) 100%);
  color: var(--text);
}

.page-shell {
  width: min(1100px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.page-header,
.controls,
.map-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.page-header,
.controls {
  padding: 1.5rem;
}

.page-header {
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #f7fbff 55%, #f5fbf3 100%);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.05;
}

.title-mark {
  display: inline-block;
  margin-right: 0.25rem;
}

.lede,
.control-note {
  margin: 0;
  color: var(--muted);
}

.lede {
  margin-top: 0.75rem;
  max-width: 64ch;
}

.fact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 1.25rem;
}

.fact-card {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(180deg, #fbfdff 0%, var(--accent-soft) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.fact-card h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: #20405d;
}

.fact-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.controls {
  margin-bottom: 1rem;
  background: var(--panel-tint);
}

.slider-label {
  display: block;
  margin-bottom: 0.75rem;
  font-weight: 700;
  color: #234a2b;
}

.slider-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
}

#time-slider {
  width: 100%;
  accent-color: var(--accent);
}

.time-readout {
  min-width: 7.5rem;
  text-align: right;
  font-weight: 700;
  color: #1f3d5a;
}

#selected-time:empty {
  display: none;
}

.control-note {
  margin-top: 0.75rem;
  font-size: 0.95rem;
}

@media (max-width: 700px) {
  .page-shell {
    width: min(100vw - 1rem, 1100px);
    padding-top: 1rem;
  }

  .page-header,
  .controls {
    padding: 1.1rem;
  }

  .slider-row {
    grid-template-columns: 1fr;
  }

  .time-readout {
    min-width: 0;
    text-align: left;
  }

  .fact-grid {
    grid-template-columns: 1fr;
  }
}