/* groundctl.org — dark, monospace, minimal */

:root {
  --bg: #0a0a0a;
  --bg2: #111;
  --bg3: #1a1a1a;
  --border: #222;
  --text: #e0e0e0;
  --text-dim: #666;
  --text-mid: #999;
  --green: #4ade80;
  --yellow: #facc15;
  --blue: #60a5fa;
  --red: #f87171;
  --mono: "Berkeley Mono", "IBM Plex Mono", "Fira Code", "Cascadia Code", ui-monospace, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max: 760px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── HERO ─────────────────────────────────────── */

.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero h1 {
  font-family: var(--mono);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
}

.tagline {
  font-size: 1.15rem;
  color: var(--text-mid);
  margin-bottom: 40px;
}

.install-block {
  display: inline-flex;
  align-items: center;
  gap: 0;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 28px;
  max-width: 100%;
}

.install-block code {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--green);
  user-select: all;
}

.copy-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0 0 0 14px;
  border-left: 1px solid var(--border);
  margin-left: 14px;
  transition: color 0.15s;
}

.copy-btn:hover { color: var(--text); }

.hero-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-secondary {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 18px;
  font-size: 0.9rem;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s;
}

.btn-secondary:hover {
  border-color: #444;
  background: var(--bg3);
  text-decoration: none;
}

.btn-ghost {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.9rem;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 6px;
  transition: color 0.15s;
}

.btn-ghost:hover { color: var(--text); text-decoration: none; }

/* ── PROBLEM ──────────────────────────────────── */

.problem {
  text-align: center;
  padding: 40px 0 56px;
  border-top: 1px solid var(--border);
}

.problem p {
  font-size: 1.05rem;
  color: var(--text-mid);
  line-height: 1.8;
}

.problem strong { color: var(--text); }

/* ── DEMO TERMINAL ────────────────────────────── */

.demo {
  margin-bottom: 72px;
}

.terminal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 32px;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.75;
  overflow-x: auto;
  white-space: pre;
}

.prompt { color: var(--text-dim); }
.project-name { color: #fff; font-weight: 600; }
.label { color: var(--text-mid); }
.bar-filled { color: var(--green); }
.bar-empty { color: #2a2a2a; }
.available { color: var(--blue); }
.claimed { color: var(--yellow); }
.success { color: var(--green); }
.comment { color: var(--text-dim); }

/* ── USE CASES ────────────────────────────────── */

.use-cases {
  margin-bottom: 72px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}

.card-icon {
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 10px;
}

.card p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin-bottom: 14px;
}

.card code {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--green);
  background: var(--bg3);
  padding: 1px 5px;
  border-radius: 3px;
}

.card-result {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-style: italic;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

/* ── HOW IT WORKS ─────────────────────────────── */

.how-it-works {
  margin-bottom: 72px;
}

.how-it-works h2,
.install h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--mono);
  margin-bottom: 28px;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.step {
  display: flex;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}

.step:last-child { border-bottom: none; }

.step-num {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  min-width: 20px;
  margin-top: 2px;
}

.step strong {
  display: block;
  font-size: 0.9rem;
  color: #fff;
  margin-bottom: 4px;
}

.step p {
  font-size: 0.875rem;
  color: var(--text-mid);
  line-height: 1.6;
}

/* ── INSTALL ──────────────────────────────────── */

.install {
  margin-bottom: 72px;
}

.commands-grid {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.cmd-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
}

.cmd-row:last-child { border-bottom: none; }

.cmd-row code {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--green);
  min-width: 240px;
}

.cmd-row span {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* ── FOOTER ───────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
  text-align: center;
}

.meta {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.meta a { color: var(--text-dim); }
.meta a:hover { color: var(--text); }

.footer-links {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-links a { color: var(--text-dim); }
.footer-links a:hover { color: var(--text); }

/* ── RESPONSIVE ───────────────────────────────── */

@media (max-width: 600px) {
  .hero { padding: 56px 0 40px; }
  .install-block { flex-direction: column; gap: 10px; }
  .copy-btn { border-left: none; border-top: 1px solid var(--border); margin-left: 0; padding: 10px 0 0; }
  .cards { grid-template-columns: 1fr; }
  .cmd-row { flex-direction: column; align-items: flex-start; gap: 4px; }
  .cmd-row code { min-width: unset; }
  .terminal { padding: 20px 18px; font-size: 0.78rem; }
}