:root {
  --bg: #fafaf8;
  --text: #1a1a1a;
  --accent: #2d6a4f;
  --accent-light: #52b788;
  --muted: #6b7280;
  --border: #e5e7eb;
  --warm: #fef3c7;
}

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

body {
  font-family: "Georgia", serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 2rem;
  border-bottom: 1px solid var(--border);
  background: white;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav .logo {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--accent);
  text-decoration: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav ul a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-family: system-ui, sans-serif;
}

nav ul a:hover { color: var(--accent); }

/* ── HERO ── */
.hero {
  display: flex;
  align-items: center;
  gap: 4rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
}

.hero-text { flex: 1; }

.hero-text h1 {
  font-size: 2.8rem;
  line-height: 1.2;
  color: var(--accent);
  margin-bottom: 1.2rem;
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-art {
  flex: 0 0 280px;
  height: 280px;
  border: 2px dashed var(--accent-light);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--warm);
  color: var(--muted);
  font-family: system-ui, sans-serif;
  font-size: 0.9rem;
  text-align: center;
  padding: 1.5rem;
  gap: 0.5rem;
}

.hero-art .art-placeholder-icon { font-size: 2.5rem; }

/* ── SECTIONS ── */
section {
  max-width: 800px;
  margin: 0 auto;
  padding: 3.5rem 2rem;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 1.2rem;
}

section p { margin-bottom: 1rem; color: #374151; }

/* ── HOW IT WORKS ── */
.pipeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.pipeline-step {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
}

.step-num {
  flex: 0 0 32px;
  height: 32px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, sans-serif;
  font-weight: bold;
  font-size: 0.9rem;
}

.step-body strong {
  display: block;
  font-family: system-ui, sans-serif;
  margin-bottom: 0.2rem;
}

.step-body span { font-size: 0.95rem; color: var(--muted); }

.sitl-callout {
  margin-top: 1.5rem;
  background: var(--warm);
  border-left: 4px solid var(--accent-light);
  padding: 1rem 1.2rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
}

/* ── CONTRIBUTIONS ── */
.contributions-empty {
  font-style: italic;
  color: var(--muted);
}

.contribution-entry {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin-top: 1rem;
  font-family: system-ui, sans-serif;
  font-size: 0.95rem;
}

.contribution-entry .repo { font-weight: bold; color: var(--accent); }
.contribution-entry .date { color: var(--muted); font-size: 0.85rem; }
.contribution-entry .status {
  display: inline-block;
  margin-top: 0.4rem;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: var(--warm);
  color: #92400e;
}

/* ── GET INVOLVED ── */
.contact-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: 6px;
  text-decoration: none;
  font-family: system-ui, sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #245a3f; }
.btn-outline { border: 1px solid var(--accent); color: var(--accent); }
.btn-outline:hover { background: #f0fdf4; }

/* ── FOOTER ── */
footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-family: system-ui, sans-serif;
  font-size: 0.85rem;
}

@media (max-width: 700px) {
  .hero { flex-direction: column; padding: 3rem 1.5rem 2rem; }
  .hero-art { width: 100%; flex: none; }
  .hero-text h1 { font-size: 2rem; }
}