/* ── HAC Landing Page Styles ── */
/* Dual-theme CSS: light default + dark mode toggle */
/* Brand-aligned with Heimdall: cyan/teal + coral, Inter font */

/* ── Theme Tokens ── */
:root {
  --bg-primary: #FFFFFF;
  --bg-surface: #FFFFFF;
  --bg-subtle: #F8F9FA;
  --accent-primary: #00ACC1;
  --accent-hover: #00838F;
  --accent-secondary: #E91E63;
  --accent-secondary-hover: #C2185B;
  --text-primary: #1A1A2E;
  --text-secondary: #5F6368;
  --text-on-accent: #FFFFFF;
  --border: #E0E4E8;
  --shadow: rgba(0,0,0,0.08);
  --card-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

[data-theme="dark"] {
  --bg-primary: #0D1117;
  --bg-surface: #161B22;
  --bg-subtle: #1C2128;
  --accent-primary: #4DD0E1;
  --accent-hover: #26C6DA;
  --accent-secondary: #FF5C8D;
  --accent-secondary-hover: #FF4081;
  --text-primary: #E6EDF3;
  --text-secondary: #8B949E;
  --text-on-accent: #FFFFFF;
  --border: #30363D;
  --shadow: rgba(0,0,0,0.3);
  --card-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.2s, color 0.2s;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-logo {
  height: 64px;
  width: auto;
  border-radius: 4px;
}

/* Light mode: show white-bg logo, hide dark-bg logo */
.nav-logo-dark { display: none; }
.nav-logo-light { display: block; }

[data-theme="dark"] .nav-logo-dark { display: block; }
[data-theme="dark"] .nav-logo-light { display: none; }

.nav-brand h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.nav-brand h1 span {
  font-weight: 400;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--accent-primary);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-secondary);
  transition: border-color 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
}

/* ── Hero ── */
.hero {
  padding: 160px 40px 80px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  max-width: 1100px;
  margin: 0 auto;
}

.hero h2 {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.hero h2 span {
  color: var(--accent-primary);
}

.hero p {
  font-size: 19px;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
}

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

.btn-primary {
  display: inline-block;
  background: var(--accent-secondary);
  color: var(--text-on-accent);
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, transform 0.1s;
}

.btn-primary:hover {
  background: var(--accent-secondary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
  padding: 12px 32px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.btn-secondary:hover {
  background: var(--accent-primary);
  color: var(--text-on-accent);
}

/* ── Stats Bar ── */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 64px;
  padding: 36px 40px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat .num {
  font-size: 38px;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.02em;
}

.stat .label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Services (reuses Heimdall product grid) ── */
.products {
  padding: 90px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.products h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.section-intro {
  text-align: center;
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 48px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow);
  border-color: var(--accent-primary);
}

.product-card .icon {
  font-size: 32px;
  margin-bottom: 14px;
}

.product-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.product-card .price {
  font-size: 12px;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: 'JetBrains Mono', monospace;
}

.product-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.55;
}

.product-card ul {
  list-style: none;
  padding: 0;
}

.product-card ul li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 20px;
  position: relative;
}

.product-card ul li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: 700;
}

/* ── Credentials ── */
.credentials {
  padding: 90px 40px;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.credentials h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 48px;
  letter-spacing: -0.01em;
}

.cred-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.cred-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 28px;
  border-left: 3px solid var(--accent-secondary);
}

.cred-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.cred-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ── About ── */
.about {
  padding: 90px 40px;
  max-width: 820px;
  margin: 0 auto;
}

.about h2 {
  font-size: 36px;
  margin-bottom: 32px;
  text-align: center;
  letter-spacing: -0.01em;
}

.about-body p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.about-body a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
}

.about-body a:hover {
  text-decoration: underline;
}

/* ── Contact ── */
.contact {
  padding: 90px 40px;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
}

.contact h2 {
  font-size: 36px;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.contact .subtitle {
  color: var(--text-secondary);
  margin-bottom: 48px;
  font-size: 17px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 16px;
  transition: border-color 0.15s;
}

.contact-card:hover {
  border-color: var(--accent-primary);
}

.contact-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 600;
}

.contact-value {
  display: block;
  font-size: 14px;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  word-break: normal;
  overflow-wrap: anywhere;
}

a.contact-value:hover {
  color: var(--accent-primary);
}

.contact-cta {
  margin-top: 24px;
}

/* ── Footer ── */
.site-footer {
  padding: 48px 40px;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
}

.site-footer a {
  color: var(--accent-primary);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
  .cred-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero h2 { font-size: 40px; }
}

@media (max-width: 600px) {
  .nav { padding: 0 20px; height: 72px; }
  .nav-logo { height: 48px; }
  .nav-brand h1 { font-size: 17px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13px; }
  .hero { padding: 110px 20px 60px; }
  .hero h2 { font-size: 30px; }
  .hero p { font-size: 16px; }
  .products, .credentials, .about, .contact { padding: 56px 20px; }
  .cred-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .stats-bar { gap: 28px; padding: 28px 20px; }
  .stat .num { font-size: 30px; }
}

/* ── Print ── */
@media print {
  .nav, .theme-toggle, .hero-cta, .contact-cta { display: none; }
  .hero { padding-top: 20px; }
  body { color: #000; background: #fff; }
}