/* Wat Rai Kluay Intersection Analysis — Deploy Website */
:root {
  --primary: #1a5490;
  --primary-dark: #0d3d6e;
  --accent: #e67e22;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #c0392b;
  --bg: #f5f7fa;
  --surface: #ffffff;
  --text: #2c3e50;
  --text-muted: #718096;
  --border: #e1e8ed;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Segoe UI", "Sarabun", "Noto Sans Thai", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Navigation */
nav.topbar {
  background: var(--primary-dark);
  color: white;
  padding: 0 24px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
nav.topbar .container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
nav.topbar .brand { font-size: 1.1em; font-weight: 700; }
nav.topbar .brand .subtitle { font-size: 0.75em; opacity: 0.8; font-weight: 400; }
nav.topbar ul { list-style: none; display: flex; gap: 4px; }
nav.topbar a {
  color: white;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 6px;
  transition: background 0.2s;
  font-size: 0.95em;
}
nav.topbar a:hover, nav.topbar a.active { background: rgba(255,255,255,0.15); }

/* Container */
.container { max-width: 1280px; margin: 0 auto; padding: 24px; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 48px 32px;
  border-radius: var(--radius);
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}
.hero h1 { font-size: 2em; margin-bottom: 10px; }
.hero p { font-size: 1.1em; opacity: 0.95; max-width: 760px; }
.hero .meta { margin-top: 16px; font-size: 0.9em; opacity: 0.85; }

/* Section */
.section {
  background: var(--surface);
  padding: 28px;
  border-radius: var(--radius);
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}
.section h2 {
  color: var(--primary);
  border-bottom: 3px solid var(--primary);
  padding-bottom: 10px;
  margin-bottom: 20px;
  font-size: 1.5em;
}
.section h3 { color: var(--primary-dark); margin: 20px 0 12px 0; }

/* KPI Cards grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.kpi {
  background: var(--surface);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-top: 4px solid var(--primary);
}
.kpi .label {
  color: var(--text-muted);
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.kpi .value {
  font-size: 2em;
  font-weight: 700;
  color: var(--primary);
}
.kpi .delta {
  font-size: 0.9em;
  color: var(--success);
  margin-top: 4px;
  font-weight: 600;
}
.kpi .delta.negative { color: var(--danger); }
.kpi.highlight { border-top-color: var(--success); }
.kpi.highlight .value { color: var(--success); }
.kpi.alert { border-top-color: var(--danger); }
.kpi.alert .value { color: var(--danger); }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.95em;
}
th {
  background: var(--primary);
  color: white;
  padding: 12px;
  text-align: left;
  font-weight: 600;
}
td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}
tr.winner td { background: #f0faf4; font-weight: 600; }
tr.loser td { background: #fdf0ee; }
tr:hover td { background: #f8fafc; }
tr.winner:hover td { background: #e8f5ee; }

/* Callout boxes */
.callout {
  padding: 16px 20px;
  border-radius: var(--radius);
  margin: 16px 0;
  border-left: 4px solid var(--primary);
  background: #f0f7fd;
}
.callout.warning { border-color: var(--warning); background: #fff8e6; }
.callout.success { border-color: var(--success); background: #f0faf4; }
.callout.danger  { border-color: var(--danger);  background: #fdf0ee; }
.callout strong { color: var(--primary); }
.callout.warning strong { color: var(--warning); }
.callout.success strong { color: var(--success); }
.callout.danger  strong { color: var(--danger); }

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  nav.topbar ul { gap: 0; }
  nav.topbar a { padding: 8px 10px; font-size: 0.85em; }
  .hero h1 { font-size: 1.4em; }
}

/* Cards */
.card {
  padding: 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 2px solid var(--border);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.card.winner { border-color: var(--success); background: #f8fdfa; }
.card.loser  { border-color: var(--danger);  background: #fdf7f6; }
.card h4 { margin-bottom: 8px; }
.card.winner h4 { color: var(--success); }
.card.loser  h4 { color: var(--danger); }

/* Footer */
footer {
  background: var(--primary-dark);
  color: white;
  padding: 28px 24px;
  margin-top: 48px;
  text-align: center;
  font-size: 0.9em;
  opacity: 0.95;
}

/* Utility */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.big-number { font-size: 2.5em; font-weight: 700; color: var(--primary); }
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.8em;
  font-weight: 600;
}
.badge.winner { background: var(--success); color: white; }
.badge.loser  { background: var(--danger);  color: white; }
.badge.neutral { background: var(--text-muted); color: white; }

/* Formula display */
.formula {
  background: #f4f6f8;
  padding: 16px;
  border-radius: 6px;
  text-align: center;
  font-size: 1.1em;
  margin: 16px 0;
  font-family: "Cambria Math", "Georgia", serif;
}