:root {
  --bg: #f7f6f3;
  --panel: #ffffff;
  --ink: #1f1f1f;
  --muted-ink: #505050;
  --accent: #6aa084;
  --accent-ink: #0f3b2a;
  --border: #e7e5df;
  --shadow: 0 1px 2px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
  --radius: 14px;
  --radius-sm: 10px;
  --space-1: 6px;
  --space-2: 10px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 36px;
  --space-6: 56px;
  --maxw: 1120px;
  --font-ui: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-serif: "Georgia", "Iowan Old Style", "Times New Roman", serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.site-header {
  padding: var(--space-6) 0 var(--space-5);
  background: linear-gradient(180deg, rgba(106,160,132,0.08), rgba(106,160,132,0));
}

.main-heading {
  margin: 0 0 var(--space-2);
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.01em;
}

.intro-text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--muted-ink);
  max-width: 70ch;
}

.section {
  margin: var(--space-5) 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.section-title {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 30px);
}

.section-description {
  margin: 0;
  color: var(--muted-ink);
  max-width: 70ch;
}

.subsection {
  margin-top: var(--space-4);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-4);
}

.subsection-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.subsection-title {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--accent-ink);
}

.subsection-description {
  margin: 0;
  color: var(--muted-ink);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-3);
}

.card {
  grid-column: span 12;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.card-title {
  margin: 0 0 var(--space-1);
  font-size: 18px;
}

.card-description {
  margin: 0 0 var(--space-2);
  color: var(--muted-ink);
}

.card-meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 10px;
  background: rgba(106,160,132,0.08);
  border: 1px solid rgba(106,160,132,0.22);
  border-radius: 999px;
  font-size: 13px;
}

.meta-label {
  font-weight: 600;
  color: var(--accent-ink);
}

.meta-path {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color: var(--accent-ink);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.06), 0 10px 28px rgba(0,0,0,0.08);
  border-color: rgba(106,160,132,0.35);
}

@media (min-width: 640px) {
  .card { grid-column: span 6; }
}

@media (min-width: 960px) {
  .card { grid-column: span 4; }
}