:root {
  --primary: #1e3a5f;
  --bg: #f4f6fb;
  --card: #ffffff;
  --white-accent: #1a6e3c;
  --black-accent: #8b1a1a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Georgia', serif;
  background: var(--bg);
  color: #2d2d2d;
  line-height: 1.75;
}
header {
  background: var(--primary);
  color: #fff;
  padding: 3.5rem 2rem 2.5rem;
  text-align: center;
}
header h1 { font-size: 2rem; margin-bottom: 0.6rem; letter-spacing: -0.01em; }
header p {
  font-size: 1.05rem;
  opacity: 0.82;
  max-width: 720px;
  margin: 0 auto;
  font-family: 'Segoe UI', system-ui, sans-serif;
}
.container { max-width: 1140px; margin: 0 auto; padding: 2.5rem 1.5rem; }

.dataset-intro {
  background: var(--card);
  border-radius: 10px;
  padding: 1.6rem 2rem;
  box-shadow: 0 2px 14px rgba(0,0,0,0.07);
  margin-bottom: 3rem;
  border-left: 5px solid #3a7bd5;
}
.dataset-intro h3 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 0.6rem;
}
.dataset-intro p {
  font-size: 0.95rem;
  font-family: 'Segoe UI', system-ui, sans-serif;
  color: #444;
}
.dataset-intro .data-link {
  margin-top: 0.85rem;
  font-size: 0.9rem;
}

/* Section */
.vis-section { margin-bottom: 4rem; }
.section-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.7rem;
  border-bottom: 3px solid;
}
.white-section .section-header { border-color: var(--white-accent); }
.black-section .section-header { border-color: var(--black-accent); }

.hat-pill {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: 'Segoe UI', system-ui, sans-serif;
}
.white-section .hat-pill { background: var(--white-accent); color: #fff; }
.black-section .hat-pill { background: var(--black-accent); color: #fff; }

.section-header h2 {
  font-size: 1.45rem;
  color: var(--primary);
}

/* Charts */
.chart-row {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-bottom: 1.4rem;
}
.chart-card {
  background: var(--card);
  border-radius: 10px;
  padding: 1.4rem;
  box-shadow: 0 2px 14px rgba(0,0,0,0.07);
  overflow-x: auto;
}
.chart-card.main { flex: 2.2; min-width: 380px; }
.chart-card.side  { flex: 1;   min-width: 280px; }
.chart-card.full  { width: 100%; }

/* Writeup */
.writeup {
  background: var(--card);
  border-radius: 10px;
  padding: 1.8rem 2rem;
  box-shadow: 0 2px 14px rgba(0,0,0,0.07);
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 0.95rem;
  color: #333;
}
.writeup h3 {
  font-size: 1.1rem;
  font-family: 'Georgia', serif;
  color: var(--primary);
  margin-bottom: 0.9rem;
}
.writeup p { margin-bottom: 0.9rem; }
.writeup p:last-child { margin-bottom: 0; }

/* Generic card */
.info-card {
  background: var(--card);
  border-radius: 10px;
  padding: 1.6rem 2rem;
  box-shadow: 0 2px 14px rgba(0,0,0,0.07);
  margin-bottom: 1.8rem;
}
.info-card h3 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 0.7rem;
}
.info-card p, .info-card li {
  font-size: 0.95rem;
  font-family: 'Segoe UI', system-ui, sans-serif;
  color: #444;
  margin-bottom: 0.5rem;
}
.info-card ul { padding-left: 1.4rem; }

/* Tooltip */
#tooltip {
  position: fixed;
  background: rgba(20,30,50,0.9);
  color: #fff;
  padding: 0.5rem 0.85rem;
  border-radius: 5px;
  font-size: 0.82rem;
  font-family: 'Segoe UI', system-ui, sans-serif;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  z-index: 9999;
  white-space: nowrap;
}

footer {
  text-align: center;
  padding: 2rem;
  color: #aaa;
  font-size: 0.85rem;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

/* Responsive SVG */
svg { display: block; }

.writeup .rubric-alignment {
  padding: 0.85rem 1rem;
  background: #f0f5fa;
  border-radius: 8px;
  border-left: 4px solid var(--primary);
  font-size: 0.92rem;
}

.linked-views-ui {
  background: var(--card);
  border-radius: 10px;
  padding: 1rem 1.25rem 1.15rem;
  box-shadow: 0 2px 14px rgba(0,0,0,0.07);
  margin-bottom: 1.5rem;
  font-family: 'Segoe UI', system-ui, sans-serif;
}
.linked-views-hint {
  font-size: 0.9rem;
  color: #444;
  line-height: 1.55;
  margin-bottom: 0.65rem;
}
.focus-panel {
  font-size: 0.9rem;
  color: #333;
  line-height: 1.5;
  padding: 0.65rem 0.85rem;
  background: #eef6ef;
  border-radius: 6px;
  border: 1px solid #c5ddc8;
  margin-bottom: 0.5rem;
}
.focus-clear {
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 0.85rem;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: #fff;
  cursor: pointer;
  color: var(--primary);
}
.focus-clear:hover { background: #f5f5f5; }

.extra-credit-card {
  border-left: 5px solid #6b4c9a;
}
.extra-credit-card h4 {
  font-size: 1.02rem;
  font-family: 'Georgia', serif;
  color: var(--primary);
  margin: 1.1rem 0 0.45rem;
}
.extra-credit-card h4:first-of-type { margin-top: 0.5rem; }