:root {
  --bg: #0f1115;
  --surface: #14171f;
  --muted: #8a92a6;
  --text: #e7eaf3;
  --accent: #4c8cff;
  --border: #232838;
  --success: #36c390;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Space Mono", sans-serif;
  line-height: 1.6;
}

/* header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(15,17,21,0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.brand-mark {
  font-family: "Space Mono", monospace;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 8px; border-radius: 8px;
}
.brand-name { font-weight: 700; letter-spacing: 0.2px; }

.nav-links { display: flex; align-items: center; gap: 18px; }
.link { color: var(--muted); text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.link:hover, .link.active { color: var(--text); background: #161924; }
.link.login {
  border: 1px solid var(--border);
  padding: 8px 14px; font-weight: 600;
}
.link.login:hover { border-color: var(--accent); color: var(--accent); }

.menu-toggle { display: none; background: none; border: 0; padding: 8px; border-radius: 8px; }
.menu-toggle .bar { display: block; width: 22px; height: 2px; margin: 4px 0; background: var(--text); }

/* header/hero */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 28px; padding: 48px 20px; }
.headline { font-size: clamp(28px, 4vw, 48px); margin: 0 0 8px; }
.subhead { color: var(--muted); margin: 0 0 20px; }
.endpoint { color: var(--text); background: #171a25; border: 1px solid var(--border); padding: 2px 8px; border-radius: 6px; }

.cta { display: flex; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border);
  color: var(--text); text-decoration: none; transition: transform .12s ease, border-color .12s ease, color .12s ease;
}
.btn:hover { transform: translateY(-1px); border-color: #2a3146; }
.btn.primary { background: #1a1f2e; border-color: #2a3146; }
.btn.primary:hover { border-color: var(--accent); color: var(--accent); }
.btn.ghost { background: transparent; }

/* codes */
.code-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}
.code-tabs { display: flex; border-bottom: 1px solid var(--border); background: #161924; }
.tab { padding: 10px 14px; color: var(--muted); background: transparent; border: 0; cursor: pointer; }
.tab.active { color: var(--text); }
.code-block { padding: 16px; }
.code-block.hidden { display: none; }

.response {
  margin-top: 8px;
  border-top: 1px dashed var(--border);
  padding-top: 8px;
}
.response-label { color: var(--success); font-family: "Space Mono", monospace; font-size: 12px; }

/* featured */
.section-title { font-size: 24px; margin: 0 0 16px; }
.features { padding: 40px 20px 64px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
  transition: transform .12s ease, border-color .12s ease;
}
.card:hover { transform: translateY(-2px); border-color: #2a3146; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.card h3 { margin: 0; font-size: 18px; }
.tag { font-size: 12px; color: var(--muted); border: 1px solid var(--border); padding: 4px 8px; border-radius: 999px; }
.meta { list-style: none; padding: 0; margin: 10px 0 0; color: var(--muted); }
.meta code { color: var(--text); background: #171a25; border: 1px solid var(--border); padding: 1px 6px; border-radius: 6px; }
.card-actions { margin-top: 12px; }

/* footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 16px; padding: 22px 20px; }
.brand.compact .brand-mark { padding: 4px 6px; }
.foot-desc { color: var(--muted); margin: 6px 0 0; }
.foot-desc a { color: var(--text); }

.social { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.social-link { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); text-decoration: none; border: 1px solid var(--border); padding: 8px 10px; border-radius: 10px; }
.social-link:hover { color: var(--text); border-color: #2a3146; }

.fine-print {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px 28px; color: var(--muted);
}

/* anims */
[data-animate] { opacity: 0; transform: translateY(8px); transition: opacity .24s ease, transform .24s ease; }
[data-animate].in { opacity: 1; transform: translateY(0); }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
}
@media (max-width: 780px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-block; }
  .nav.open .nav-links {
    display: flex; position: absolute; top: 64px; right: 20px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 10px; gap: 6px; flex-direction: column;
  }
  .grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}