/* LAN Lab — main stylesheet
   Design tokens and base styles. See CLAUDE.md > Design system. */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #0f1419;        /* page background */
  --surface: #1a2128;   /* cards, nav */
  --text: #e6e8eb;      /* body text */
  --muted: #8b95a1;     /* secondary text */
  --accent: #2dd4bf;    /* teal — links, primary accents */
  --accent-2: #f59e0b;  /* amber — highlights, CTAs */
  --border: #2a323c;
}

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

html {
  scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  font-weight: 600;
}

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

a:hover {
  text-decoration: underline;
}

/* Sticky site navigation */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(15, 20, 25, 0.85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.site-nav .container {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav .brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
}

.site-nav .brand img {
  height: 32px;
  width: auto;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  text-decoration: none;
}

/* Mobile hamburger — checkbox-hack, no JS */
.site-nav .nav-toggle-label {
  display: none;
  cursor: pointer;
  padding: 0.5rem;
}

.site-nav .nav-toggle-label span,
.site-nav .nav-toggle-label span::before,
.site-nav .nav-toggle-label span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
}

.site-nav .nav-toggle-label span {
  position: relative;
}

.site-nav .nav-toggle-label span::before,
.site-nav .nav-toggle-label span::after {
  content: "";
  position: absolute;
}

.site-nav .nav-toggle-label span::before {
  top: -7px;
}

.site-nav .nav-toggle-label span::after {
  top: 7px;
}

@media (max-width: 640px) {
  .site-nav .nav-toggle-label {
    display: block;
  }

  .site-nav .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.5rem;
  }

  .site-nav .nav-toggle:checked ~ .nav-menu {
    display: flex;
  }
}

/* Site footer — shared across pages */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 2rem 0;
  margin-top: 2rem;
}

.site-footer .container {
  text-align: center;
}

.site-footer .footer-contact {
  color: var(--text);
  font-size: 0.9rem;
}

.site-footer .sep {
  margin: 0 0.4rem;
  color: var(--border);
}