/* SAIG Landing Page — Clean, fast, SEO-optimized */

:root {
  --c-bg: #0a0b10;
  --c-surface: #12131a;
  --c-surface-2: #1a1b25;
  --c-border: #2a2b3a;
  --c-text: #e4e4e7;
  --c-text-dim: #8b8d98;
  --c-primary: #6366f1;
  --c-primary-hover: #818cf8;
  --c-accent: #22c55e;
  --c-amber: #d97706;
  --c-red: #dc2626;
  --radius: 8px;
  --max-w: 1120px;
}

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Skip Nav ── */
.skip-nav {
  position: absolute; top: -100px; left: 16px; z-index: 200;
  background: var(--c-primary); color: #fff; padding: 8px 16px;
  border-radius: var(--radius); font-size: 14px; font-weight: 600;
  text-decoration: none; transition: top 0.15s;
}
.skip-nav:focus { top: 8px; }

/* ── Nav ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 11, 16, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  will-change: backdrop-filter;
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 56px;
}
.nav-logo { text-decoration: none; color: var(--c-text); font-size: 16px; }
.nav-logo strong { color: var(--c-primary); font-size: 18px; }
.nav-logo-sub { color: var(--c-text-dim); font-size: 13px; margin-left: 6px; }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { color: var(--c-text-dim); text-decoration: none; font-size: 14px; transition: color 0.15s; }
.nav-links a:hover { color: var(--c-text); }
.nav-lang { position: relative; border-left: 1px solid var(--c-border); padding-left: 16px; }
.nav-lang-btn {
  display: inline-flex; align-items: center; gap: 4px; cursor: pointer;
  background: none; border: 1px solid var(--c-border); border-radius: var(--radius);
  color: var(--c-text); padding: 4px 10px; font-size: 13px;
}
.nav-lang-btn:hover { border-color: var(--c-primary); }
.nav-lang-btn .flag { font-size: 16px; line-height: 1; }
.nav-lang-btn .arrow { font-size: 9px; }
.nav-lang-dropdown {
  display: none; position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius);
  padding: 4px; min-width: 160px; z-index: 1000;
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.nav-lang-dropdown.open { display: block; }
.nav-lang-dropdown a {
  display: flex !important; align-items: center; gap: 8px; padding: 6px 10px;
  border-radius: 4px; font-size: 13px !important; color: var(--c-text-dim) !important;
  text-decoration: none; width: 100%;
}
.nav-lang-dropdown a:hover { background: rgba(99,102,241,0.1); color: var(--c-text) !important; }
.nav-lang-dropdown a.active { background: rgba(139,92,246,0.15); color: #a78bfa !important; }
.nav-lang-dropdown .flag { font-size: 16px; }
.nav-cta {
  background: var(--c-primary) !important; color: #fff !important;
  padding: 8px 18px !important; border-radius: var(--radius); font-weight: 600;
}
.nav-cta:hover { background: var(--c-primary-hover) !important; }

/* ── Hero ── */
.hero {
  padding: 140px 0 80px; text-align: center; min-height: 480px;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-surface) 100%);
}
.hero-badge {
  display: inline-block; background: rgba(34, 197, 94, 0.12); color: var(--c-accent);
  padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 600;
  margin-bottom: 24px; border: 1px solid rgba(34, 197, 94, 0.25);
}
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.15; font-weight: 700; margin-bottom: 20px; }
.hero-sub { font-size: 18px; color: var(--c-text-dim); max-width: 680px; margin: 0 auto 32px; line-height: 1.7; }
.hero-sub strong { color: var(--c-text); }
.hero-cta { display: flex; gap: 16px; justify-content: center; margin-bottom: 32px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; }
.hero-trust span {
  font-size: 13px; color: var(--c-text-dim);
  padding-left: 18px; position: relative;
}
.hero-trust span::before {
  content: "\2713"; position: absolute; left: 0; color: var(--c-accent);
}

/* ── Buttons ── */
.btn-primary, .btn-secondary {
  display: inline-block; padding: 12px 28px; border-radius: var(--radius);
  font-size: 15px; font-weight: 600; text-decoration: none; transition: all 0.15s;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-hover); transform: translateY(-1px); }
.btn-secondary { background: transparent; color: var(--c-text); border: 1px solid var(--c-border); }
.btn-secondary:hover { border-color: var(--c-text-dim); }
.btn-lg { padding: 16px 36px; font-size: 17px; }

/* ── Sections ── */
.section { padding: 80px 0; contain: layout style; }
.section-dark { background: var(--c-surface); }
.section h2 { font-size: clamp(26px, 3.5vw, 38px); text-align: center; margin-bottom: 16px; }
.section-sub { text-align: center; color: var(--c-text-dim); max-width: 600px; margin: 0 auto 48px; font-size: 16px; }

/* ── Grids ── */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; margin-top: 40px; }

/* ── Cards ── */
.card, .feature, .compliance-card, .deploy-option {
  background: var(--c-surface-2); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 28px;
}
.card-icon {
  margin-bottom: 18px;
  font-size: 0; /* hide emoji fallback text */
}
.card-icon svg {
  width: 36px; height: 36px;
  stroke: var(--c-primary); fill: none;
  stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
}
.card h3, .feature h3, .compliance-card h3, .deploy-option h3 {
  font-size: 18px; margin-bottom: 10px; color: var(--c-text);
}
.card h3 a, .feature h3 a, .compliance-card h3 a {
  color: var(--c-text); text-decoration: none;
}
.card h3 a:hover, .feature h3 a:hover, .compliance-card h3 a:hover {
  color: var(--c-primary);
}
.card p, .feature p, .compliance-card p, .deploy-option p {
  font-size: 14px; color: var(--c-text-dim); line-height: 1.7;
}

/* ── Flow diagram ── */
.flow {
  display: flex; align-items: center; justify-content: center; gap: 16px;
  margin-top: 48px; flex-wrap: wrap;
}
.flow-step {
  background: var(--c-surface-2); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 24px 32px; text-align: center; min-width: 160px;
}
.flow-highlight { border-color: var(--c-primary); background: rgba(99, 102, 241, 0.08); }
.flow-num { font-size: 24px; font-weight: 700; color: var(--c-primary); margin-bottom: 8px; }
.flow-label { font-size: 16px; font-weight: 600; }
.flow-detail { font-size: 12px; color: var(--c-text-dim); margin-top: 6px; }
.flow-arrow { font-size: 24px; color: var(--c-text-dim); }

/* ── Steps ── */
.steps { max-width: 640px; margin: 48px auto 0; }
.step { padding: 24px 0; border-bottom: 1px solid var(--c-border); }
.step:last-child { border-bottom: none; }
.step-num { font-size: 13px; color: var(--c-primary); font-weight: 700; margin-bottom: 6px; }
.step h3 { font-size: 20px; margin-bottom: 8px; }
.step p { color: var(--c-text-dim); font-size: 15px; }
.step code { background: var(--c-surface-2); padding: 2px 8px; border-radius: 4px; font-size: 13px; }

/* ── FAQ ── */
.faq-list { max-width: 720px; margin: 40px auto 0; }
.faq-item {
  border-bottom: 1px solid var(--c-border); padding: 16px 0;
}
.faq-item summary {
  font-size: 16px; font-weight: 600; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--c-text-dim); }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding-top: 12px; color: var(--c-text-dim); font-size: 15px; line-height: 1.7; }

/* ── CTA Section ── */
.section-cta {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(34, 197, 94, 0.08));
  text-align: center;
}
.cta-actions { display: flex; gap: 16px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }
.cta-note { margin-top: 16px; font-size: 13px; color: var(--c-text-dim); }

/* ── Footer ── */
.footer { background: var(--c-surface); border-top: 1px solid var(--c-border); padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand p { color: var(--c-text-dim); font-size: 13px; margin-top: 8px; }
.footer-links h4 { font-size: 13px; color: var(--c-text-dim); text-transform: uppercase; margin-bottom: 12px; }
.footer-links a { display: block; color: var(--c-text-dim); text-decoration: none; font-size: 14px; margin-bottom: 8px; }
.footer-links a:hover { color: var(--c-text); }
.footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--c-border); text-align: center; }
.footer-bottom p { font-size: 13px; color: var(--c-text-dim); }

/* ── Evidence Example ── */
.evidence-wrap { max-width: 620px; margin: 0 auto 32px; }
.evidence-code {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-text);
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
}
.evidence-note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--c-text-dim);
  text-align: center;
  font-style: italic;
}
.evidence-bullets { margin-top: 8px; }

/* ── Preview Badge ── */
.badge-preview {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  margin-left: 8px;
  color: var(--c-amber);
  border: 1px solid var(--c-amber);
  border-radius: 4px;
  vertical-align: middle;
}

/* ── Disclaimer ── */
.section-disclaimer {
  margin-top: 32px;
  padding: 16px 20px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-text-dim);
  border-left: 3px solid var(--c-border);
  background: var(--c-surface);
  border-radius: var(--radius);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-lang { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .flow { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }
  .grid-3 { grid-template-columns: 1fr; }
}