/* ── Artifice — Landing Page ── */

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(/static/fonts/inter-latin.woff2) format('woff2');
}
@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url(/static/fonts/fira-code-latin.woff2) format('woff2');
}
:root {
  --bg: #0f1923;
  --bg-deep: #0b1420;
  --bg-surface: #111b2b;
  --panel: #162233;
  --border: #243447;
  --border-dim: #141e32;
  --text: #d4dce6;
  --text-dim: #7a8a9e;
  --text-muted: #384560;
  --accent: #5b8af0;
  --accent-hover: #4a75d4;
  --accent-dim: rgba(91,138,240,0.08);
  --color-danger: #ef4444;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --font-mono: 'Fira Code','Cascadia Code','Consolas','Courier New', monospace;
  --font-ui: 'Inter','Segoe UI', system-ui, -apple-system, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Subtle grid background ── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(36,52,71,0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36,52,71,0.3) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 30%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 30%, black 20%, transparent 80%);
}

/* ── Top bar ── */
.topbar {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
}
.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.topbar-brand .brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 5px;
  background: var(--bg-deep);
  border: 1.5px solid rgba(212,220,230,0.25);
  font-size: 0.62em;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  box-shadow: 0 0 10px rgba(0,0,0,0.6), 0 0 20px rgba(0,0,0,0.3);
  text-shadow: 0 0 8px rgba(0,0,0,0.7);
}
.topbar-brand span {
  font-weight: 700;
  font-size: 0.95em;
  color: var(--text);
}
.topbar-nav {
  display: flex;
  gap: 6px;
}
.topbar-nav a {
  padding: 6px 16px;
  border-radius: 4px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.88em;
  transition: color 0.15s, background 0.15s;
}
.topbar-nav a:hover { color: var(--text); background: var(--bg-surface); }

/* ── Hero ── */
.hero {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 60px 24px 40px;
  max-width: 800px;
  margin: 0 auto;
}
.hero-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72em;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
  padding: 4px 12px;
  border: 1px solid rgba(91,138,240,0.25);
  border-radius: 3px;
  background: rgba(91,138,240,0.06);
}
.hero h1 {
  font-size: 2.8em;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: 16px;
}
.hero .tagline {
  font-family: var(--font-mono);
  font-size: 0.95em;
  color: var(--text-dim);
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.hero .desc {
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.65;
  font-size: 0.95em;
}

/* ── CTA ── */
.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 5px;
  font-size: 0.92em;
  font-weight: 600;
  font-family: var(--font-ui);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.1s;
  border: 1px solid transparent;
}
.cta-btn:hover { transform: translateY(-1px); }
.cta-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.cta-primary:hover { background: var(--accent-hover); }
.cta-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.cta-secondary:hover { border-color: var(--accent); background: var(--accent-dim); }

/* ── Stats bar ── */
.stats-bar {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto 56px;
  display: flex;
  justify-content: center;
  gap: 32px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-dim);
  border-bottom: 1px solid var(--border-dim);
}
.stat-item { text-align: center; }
.stat-val {
  font-family: var(--font-mono);
  font-size: 1.3em;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 0.72em;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

/* ── Feature grid ── */
.features {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 56px;
}
.features-label {
  text-align: center;
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  font-weight: 600;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-dim);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  overflow: hidden;
}
.feature-card {
  background: var(--bg);
  padding: 24px 20px;
  transition: background 0.2s;
}
.feature-card:hover { background: var(--bg-surface); }
.feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.72em;
  font-weight: 700;
  letter-spacing: -0.5px;
}
.fi-recon {
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  color: var(--color-success);
}
.fi-proto {
  background: rgba(50,184,198,0.1);
  border: 1px solid rgba(50,184,198,0.25);
  color: #32b8c6;
}
.fi-topo {
  background: rgba(91,138,240,0.1);
  border: 1px solid rgba(91,138,240,0.25);
  color: var(--accent);
}
.fi-risk {
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.25);
  color: var(--color-warning);
}
.fi-c2 {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.25);
  color: var(--color-danger);
}
.fi-pcap {
  background: rgba(168,85,247,0.1);
  border: 1px solid rgba(168,85,247,0.25);
  color: #a855f7;
}
.feature-card h3 {
  font-size: 0.88em;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.feature-card p {
  font-size: 0.82em;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ── Protocol strip ── */
.proto-strip {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px 48px;
  text-align: center;
}
.proto-strip-label {
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-weight: 600;
}
.proto-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
}
.proto-tag {
  font-family: var(--font-mono);
  font-size: 0.75em;
  padding: 3px 10px;
  border-radius: 3px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  background: var(--panel);
}
.proto-tag.ot {
  border-color: rgba(34,197,94,0.3);
  color: var(--color-success);
  background: rgba(34,197,94,0.06);
}

/* ── Performance callout ── */
.perf-callout {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 32px 24px 48px;
  max-width: 700px;
  margin: 0 auto;
}
.perf-stat {
  font-family: var(--font-mono);
  font-size: 1.15em;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.perf-stat .hl { color: var(--accent); }
.perf-desc {
  font-size: 0.82em;
  color: var(--text-muted);
}

/* ── Chain viz ── */
.chain-section {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px 56px;
  text-align: center;
}
.chain-label {
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 600;
}
.chain-steps {
  display: flex;
  gap: 0;
  align-items: center;
  justify-content: center;
}
.chain-step {
  padding: 8px 20px;
  font-family: var(--font-mono);
  font-size: 0.82em;
  font-weight: 600;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
}
.chain-step:first-child { border-radius: 4px 0 0 4px; }
.chain-step:last-child { border-radius: 0 4px 4px 0; }
.chain-sep {
  padding: 8px 0;
  background: var(--border);
  color: var(--text-muted);
  font-size: 0.65em;
  width: 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ── Footer ── */
.landing-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--border-dim);
  font-size: 0.78em;
  color: var(--text-muted);
}
.landing-footer a {
  color: var(--text-dim);
  text-decoration: none;
  margin: 0 10px;
}
.landing-footer a:hover { color: var(--text); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero h1 { font-size: 2em; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-bar { flex-wrap: wrap; gap: 16px; }
  .chain-steps { flex-wrap: wrap; }
  .chain-sep { display: none; }
  .chain-step { border-radius: 4px !important; }
}