*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f1117;
  --bg-surface: #1a1d27;
  --bg-elevated: #242736;
  --accent: #639922;
  --accent-dim: #4a7019;
  --text: #e8eaf0;
  --text-muted: #8b8fa8;
  --border: #2e3147;
  --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html, body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Nav ── */
nav {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 6px 12px;
  border-radius: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color 0.15s, background-color 0.15s;
}

.nav-links a:hover {
  color: var(--text);
  background-color: var(--bg-elevated);
}

.nav-links a.active {
  color: var(--accent);
  background-color: rgba(99, 153, 34, 0.12);
}

/* ── Layout ── */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

/* ── Typography ── */
h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

p {
  color: var(--text-muted);
  max-width: 600px;
}

/* ── Cards (used on homepage) ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-decoration: none;
  display: block;
  transition: border-color 0.15s, background-color 0.15s;
}

.card:hover {
  border-color: var(--accent);
  background-color: var(--bg-elevated);
}

.card-icon {
  font-size: 1.75rem;
  margin-bottom: 14px;
  display: block;
}

.card h2 {
  color: var(--text);
  margin-bottom: 6px;
}

.card p {
  font-size: 0.875rem;
  line-height: 1.5;
}

.card-arrow {
  display: inline-block;
  margin-top: 16px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
}

/* ── Hero ── */
.hero {
  padding: 40px 0 0;
}

.hero h1 {
  font-size: 2.5rem;
}

.hero p {
  font-size: 1.0625rem;
  margin-top: 10px;
}

/* ── Placeholder pages ── */
.page-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 28px;
  margin-bottom: 40px;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  background-color: rgba(99, 153, 34, 0.15);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.placeholder-box {
  background-color: var(--bg-surface);
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 48px 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9375rem;
}