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

:root {
  --bg:           #0D0D0D;
  --bg-card:      #161616;
  --bg-code:      #111111;
  --border:       #232323;
  --border-hi:    #333333;
  --text:         #E8E8E3;
  --muted:        #666660;
  --dimmed:       #8A8A83;
  --accent:       #6EE7B7;
  --accent-dim:   rgba(110,231,183,0.10);
  --accent-border:rgba(110,231,183,0.25);
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;
  --font-body:    'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

/* ── NAV ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 56px;
}
.nav-inner {
  max-width: 900px; margin: 0 auto; padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 100%;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 15px; font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--dimmed); font-weight: 300; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  font-size: 13px; font-weight: 400;
  color: var(--dimmed);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent); }
.nav-cta {
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 500;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  background: var(--accent-dim);
  padding: 6px 14px;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.nav-cta:hover { background: rgba(110,231,183,0.18); border-color: rgba(110,231,183,0.4); }

/* ── LAYOUT ── */
.container      { max-width: 900px;  margin: 0 auto; padding: 0 2rem; }
.container-wide { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

section { padding: 5rem 0; }
section + section { border-top: 1px solid var(--border); }

/* ── TYPE ── */
h1, h2, h3, h4 { font-weight: 500; line-height: 1.3; color: var(--text); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem);  letter-spacing: -0.02em; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1rem; font-weight: 600; }

p { color: var(--dimmed); }
p + p { margin-top: 1rem; }

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

.label {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 1rem; display: block;
}

/* ── COMPONENTS ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1.75rem 2rem;
}
.card:hover { border-color: var(--border-hi); }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 2px 6px;
}

pre {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 1.5rem;
  overflow-x: auto;
  line-height: 1.8;
  color: var(--text);
}
pre .c  { color: var(--muted); }
pre .kw { color: var(--accent); }
pre .num{ color: #93C5FD; }
pre .str{ color: #FCA5A5; }
pre .op { color: var(--dimmed); }

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 500;
  padding: 10px 22px;
  cursor: pointer; text-decoration: none;
  transition: all 0.15s; letter-spacing: 0.03em;
  border: none;
}
.btn-primary { background: var(--accent); color: #0D0D0D; }
.btn-primary:hover { background: #86EFCB; text-decoration: none; }
.btn-ghost   { background: transparent; color: var(--text); border: 1px solid var(--border-hi); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.note {
  border-left: 2px solid var(--accent);
  padding: 1rem 1.25rem;
  background: var(--accent-dim);
  font-size: 0.9rem;
}
.note strong { color: var(--accent); font-weight: 500; }

.warn {
  border-left: 2px solid #FCA5A5;
  padding: 1rem 1.25rem;
  background: rgba(252,165,165,0.08);
  font-size: 0.9rem;
}
.warn p { color: var(--dimmed); }
.warn strong { color: #FCA5A5; font-weight: 500; }

.tag {
  font-family: var(--font-mono);
  font-size: 10px; color: var(--muted);
  border: 1px solid var(--border);
  padding: 2px 8px; letter-spacing: 0.03em;
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 3rem 2rem;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
.footer-logo { font-family: var(--font-mono); font-size: 13px; color: var(--accent); font-weight: 500; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-size: 13px; color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.footer-copy { font-family: var(--font-mono); font-size: 11px; color: var(--muted); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav-inner { padding: 0 1rem; }
  .nav-links { gap: 1rem; }
  .nav-cta { display: none; }
}