/* h3xed.app — Design System */

:root {
  --bg-deep:    #0a0a0f;
  --bg:         #12121a;
  --surface:    #1a1a2e;
  --surface-2:  #22223a;
  --ink:        #e8e8f0;
  --muted:      #8888a0;
  --border:     #2a2a3e;
  --accent:     #00d4aa;
  --accent-dim: rgba(0,212,170,.15);
  --accent-glow:rgba(0,212,170,.35);
  --hover:      #00f0c0;
  --code-bg:    #0d0d18;
  --code-border:#1e1e30;
  --danger:     #f87171;
  --warn:       #fbbf24;
  --success:    #4ade80;
  --radius:     8px;
  --radius-lg:  12px;
  --max-width:  1120px;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono:       'SF Mono', 'Fira Code', 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

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

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--hover); }

img { max-width: 100%; display: block; }

/* ---- Layout ---- */

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

section { padding: 80px 0; }
section + section { border-top: 1px solid var(--border); }

/* ---- Nav ---- */

.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10,10,15,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.5px;
}

.nav-logo span { color: var(--accent); }

.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--muted); font-size: .9rem; font-weight: 500; }
.nav-links a:hover { color: var(--ink); }

.nav-toggle { display: none; background: none; border: none; color: var(--ink); cursor: pointer; font-size: 1.5rem; }

/* ---- Hero ---- */

.hero {
  padding: 160px 0 100px;
  text-align: center;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(0,212,170,.08) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 100%);
}

.hero-wordmark {
  font-family: var(--mono);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 800;
  letter-spacing: -2px;
  margin-bottom: 16px;
}

.hero-wordmark span { color: var(--accent); }

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--muted);
  max-width: 500px;
  margin: 0 auto 40px;
}

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---- Buttons ---- */

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0f;
}
.btn-primary:hover {
  background: var(--hover);
  color: #0a0a0f;
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- Section Headings ---- */

.section-label {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 48px;
}

.section-center { text-align: center; }
.section-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* ---- Feature Grid ---- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color .2s, box-shadow .2s;
}

.feature-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-dim);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 12px;
  display: block;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.5;
}

/* ---- Terminal / Code Block ---- */

.terminal {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .85rem;
  line-height: 1.8;
  max-width: 700px;
}

.terminal-header {
  display: flex; gap: 8px; margin-bottom: 16px;
}
.terminal-dot { width: 12px; height: 12px; border-radius: 50%; }
.terminal-dot.red { background: #f87171; }
.terminal-dot.yellow { background: #fbbf24; }
.terminal-dot.green { background: #4ade80; }

.terminal .cmd { color: var(--accent); }
.terminal .comment { color: #555570; }

/* ---- Inline Code ---- */

code {
  font-family: var(--mono);
  font-size: .85em;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 2px 6px;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .85rem;
  line-height: 1.7;
  margin: 16px 0;
}

/* ---- Docs Layout ---- */

.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  padding-top: 80px;
  min-height: 100vh;
}

.docs-sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
}

.docs-sidebar h4 {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
  margin-bottom: 12px;
  margin-top: 24px;
}
.docs-sidebar h4:first-child { margin-top: 0; }

.docs-sidebar a {
  display: block;
  padding: 6px 12px;
  color: var(--muted);
  font-size: .9rem;
  border-radius: 6px;
  margin-bottom: 2px;
}
.docs-sidebar a:hover { color: var(--ink); background: var(--surface); }
.docs-sidebar a.active { color: var(--accent); background: var(--accent-dim); }

.docs-content {
  max-width: 760px;
  padding-bottom: 80px;
}

.docs-content h1 { font-size: 2rem; margin-bottom: 12px; }
.docs-content h2 { font-size: 1.4rem; margin-top: 48px; margin-bottom: 16px; padding-top: 24px; border-top: 1px solid var(--border); }
.docs-content h3 { font-size: 1.1rem; margin-top: 32px; margin-bottom: 12px; }
.docs-content p { color: var(--muted); margin-bottom: 16px; }
.docs-content ul, .docs-content ol { color: var(--muted); margin-bottom: 16px; padding-left: 24px; }
.docs-content li { margin-bottom: 6px; }
.docs-content strong { color: var(--ink); }

/* Callout boxes */
.callout {
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 20px 0;
  font-size: .9rem;
  border-left: 3px solid;
}
.callout-info { background: var(--accent-dim); border-color: var(--accent); }
.callout-warn { background: rgba(251,191,36,.1); border-color: var(--warn); }
.callout-danger { background: rgba(248,113,113,.1); border-color: var(--danger); }

/* ---- Table ---- */

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: .9rem;
}

th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--ink); font-weight: 600; }
td { color: var(--muted); }
td code { font-size: .8rem; }

/* ---- Footer ---- */

.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  text-align: center;
  color: var(--muted);
  font-size: .85rem;
}

.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 12px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent); }

/* ---- Responsive ---- */

@media (max-width: 768px) {
  section { padding: 48px 0; }
  .hero { padding: 120px 0 60px; }
  .feature-grid { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; gap: 24px; }
  .docs-sidebar { position: static; }

  .nav-links { display: none; position: absolute; top: 60px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px 24px; gap: 12px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }

  .terminal { font-size: .78rem; padding: 16px 20px; }
}