/* Pathlight landing page — dark, terminal-adjacent, type-forward. */

:root {
  color-scheme: dark;
  --bg: #09090b;
  --panel: #18181b;
  --panel-hi: #27272a;
  --border: #2a2a30;
  --border-hi: #3f3f46;
  --text: #e4e4e7;
  --text-dim: #a1a1aa;
  --text-mute: #71717a;
  --text-faint: #52525b;
  --accent: #60a5fa;
  --accent-hi: #93c5fd;
  --accent-bg: rgba(59, 130, 246, 0.15);
  --accent-border: rgba(59, 130, 246, 0.35);
  --ok: #6ee7b7;
  --warn: #fbbf24;
  --danger: #fca5a5;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Subtle dotted grid behind everything. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

main, nav, footer { position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
code { font-family: var(--mono); font-size: 0.9em; }

.brand { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; color: var(--text); }
.brand-accent { color: var(--accent); }

/* ------------- Nav ------------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px clamp(24px, 5vw, 48px);
  max-width: 1200px;
  margin: 0 auto;
}
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  color: var(--text-dim);
  font-size: 14px;
  transition: color .15s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  color: var(--text) !important;
  padding: 6px 14px;
  border: 1px solid var(--border-hi);
  border-radius: 8px;
  font-weight: 500;
}
.nav-cta:hover { border-color: var(--accent); color: var(--accent) !important; }

/* ------------- Hero ------------- */
.hero {
  max-width: 1200px;
  margin: 40px auto 80px;
  padding: 40px clamp(24px, 5vw, 48px) 80px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 72px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin: 0 0 24px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

h1 {
  font-size: clamp(40px, 5.5vw, 68px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0 0 24px;
}
.highlight {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-hi) 60%, #c4b5fd 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 0 36px;
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform .1s, background .15s, border-color .15s;
}
.btn-primary {
  background: var(--accent);
  color: #09090b;
}
.btn-primary:hover { background: var(--accent-hi); transform: translateY(-1px); }
.btn-ghost {
  color: var(--text);
  border-color: var(--border-hi);
}
.btn-ghost:hover { border-color: var(--text-dim); background: var(--panel); }

.install-pill {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px 10px 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
}
.install-pill code { color: var(--text); }
.install-pill code::before { content: "$ "; color: var(--text-faint); }
.copy {
  background: var(--panel-hi);
  border: 1px solid var(--border-hi);
  color: var(--text-dim);
  font: inherit;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.copy:hover { color: var(--text); border-color: var(--text-dim); }

/* ------------- Hero visual: animated waterfall ------------- */
.hero-visual {
  position: relative;
}
.wf-frame {
  background: #0e0e11;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(96, 165, 250, 0.08);
  animation: lift 0.8s ease-out both;
}
@keyframes lift {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.wf-titlebar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: #0a0a0c;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
}
.wf-titlebar .dot-red,
.wf-titlebar .dot-amber,
.wf-titlebar .dot-green {
  width: 10px; height: 10px; border-radius: 999px;
}
.wf-titlebar .dot-red { background: #ef4444; }
.wf-titlebar .dot-amber { background: #f59e0b; }
.wf-titlebar .dot-green { background: #10b981; }
.wf-title { margin-left: 8px; font-family: var(--mono); color: var(--text); }
.wf-badge {
  margin-left: auto;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  color: var(--ok);
  border: 1px solid rgba(16, 185, 129, 0.3);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.wf-axis {
  display: flex;
  justify-content: space-between;
  padding: 6px 16px 2px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-faint);
  border-bottom: 1px solid rgba(42, 42, 48, 0.5);
}

.wf-row {
  display: grid;
  grid-template-columns: 40px 1fr 2.5fr;
  gap: 10px;
  align-items: center;
  padding: 8px 16px;
  border-bottom: 1px solid rgba(42, 42, 48, 0.3);
  font-size: 12px;
  animation: row-in 0.4s ease-out both;
}
.wf-row:nth-child(3) { animation-delay: 0.1s; }
.wf-row:nth-child(4) { animation-delay: 0.25s; }
.wf-row:nth-child(5) { animation-delay: 0.4s; }
.wf-row:nth-child(6) { animation-delay: 0.55s; }
.wf-row:nth-child(7) { animation-delay: 0.7s; }
.wf-row:nth-child(8) { animation-delay: 0.85s; }
.wf-row:nth-child(9) { animation-delay: 1s; }
@keyframes row-in {
  from { opacity: 0; transform: translateX(-4px); }
  to { opacity: 1; transform: translateX(0); }
}
.wf-row.wf-highlight { background: rgba(96, 165, 250, 0.06); }

.wf-type {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  padding: 2px 6px;
  border-radius: 4px;
  text-align: center;
  font-weight: 600;
}
.wf-type.t-llm { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
.wf-type.t-tool { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.wf-type.t-retrieval { background: rgba(139, 92, 246, 0.2); color: #c4b5fd; }

.wf-name {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wf-bar {
  position: relative;
  height: 10px;
  background: rgba(63, 63, 70, 0.4);
  border-radius: 3px;
  overflow: hidden;
}
.wf-fill {
  position: absolute;
  top: 0;
  height: 100%;
  border-radius: 3px;
  opacity: 0.85;
  animation: fill 0.5s cubic-bezier(.2,.7,.3,1) both;
  transform-origin: left;
}
.wf-row:nth-child(3) .wf-fill { animation-delay: 0.15s; }
.wf-row:nth-child(4) .wf-fill { animation-delay: 0.3s; }
.wf-row:nth-child(5) .wf-fill { animation-delay: 0.45s; }
.wf-row:nth-child(6) .wf-fill { animation-delay: 0.6s; }
.wf-row:nth-child(7) .wf-fill { animation-delay: 0.75s; }
.wf-row:nth-child(8) .wf-fill { animation-delay: 0.9s; }
.wf-row:nth-child(9) .wf-fill { animation-delay: 1.05s; }
@keyframes fill { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.wf-fill.t-llm { background: #3b82f6; }
.wf-fill.t-tool { background: #10b981; }
.wf-fill.t-retrieval { background: #8b5cf6; }

/* ------------- Features ------------- */
.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px clamp(24px, 5vw, 48px) 40px;
  display: flex;
  flex-direction: column;
  gap: 120px;
}

.feature {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}
.feature.flip .feature-media { order: -1; }

.feature-text h2 {
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 20px;
}
.feature-text p {
  font-size: 16px;
  color: var(--text-dim);
  margin: 0;
}
.feature-text code {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--accent-hi);
}
.feature-media {
  position: relative;
}
.feature-media img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.7);
  background: var(--panel);
}

/* ------------- Pillar grid ------------- */
.pillars {
  max-width: 1200px;
  margin: 120px auto 40px;
  padding: 0 clamp(24px, 5vw, 48px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.pillar {
  padding: 24px;
  background: rgba(24, 24, 27, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color .15s, transform .15s;
}
.pillar:hover { border-color: var(--border-hi); transform: translateY(-2px); }
.pillar h3 {
  font-size: 15px;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--text);
}
.pillar p {
  margin: 0;
  font-size: 14px;
  color: var(--text-dim);
}
.pillar code {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 12.5px;
  color: var(--accent-hi);
}

/* ------------- Install ------------- */
.install {
  max-width: 1200px;
  margin: 120px auto 40px;
  padding: 0 clamp(24px, 5vw, 48px);
}
.install h2 {
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 40px;
}
.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}
.install-card {
  padding: 24px;
  background: rgba(24, 24, 27, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.install-card .eyebrow { margin: 0 0 16px; }
.install-card pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  margin: 0 0 12px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text);
}
.install-card p {
  font-size: 13px;
  color: var(--text-mute);
  margin: 12px 0 0;
}
.install-card code {
  background: var(--panel-hi);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--accent-hi);
}

/* ------------- Final CTA ------------- */
.cta-final {
  max-width: 900px;
  margin: 120px auto 80px;
  padding: 60px clamp(24px, 5vw, 48px);
  text-align: center;
  border-top: 1px solid var(--border);
}
.cta-final h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 32px;
}
.cta-final code {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.85em;
  color: var(--text-dim);
}
.cta-final .cta-row { justify-content: center; }

/* ------------- Footer ------------- */
footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px clamp(24px, 5vw, 48px) 60px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}
.footer-grid a {
  display: block;
  color: var(--text-dim);
  font-size: 13px;
  padding: 4px 0;
  transition: color .15s;
}
.footer-grid a:hover { color: var(--accent); }
.footer-heading {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin: 0 0 12px;
}
.footer-muted {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-faint);
  margin: 6px 0 0;
}

/* ------------- Responsive ------------- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    margin-top: 24px;
    padding-bottom: 60px;
  }
  .feature, .feature.flip {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature.flip .feature-media { order: 0; }
  .features { gap: 72px; padding-bottom: 60px; }
  .pillars, .install, .cta-final { margin-top: 72px; }
}

@media (max-width: 520px) {
  .nav-links a:not(.nav-cta) { display: none; }
  .install-pill { flex-wrap: wrap; }
}

/* Respect prefers-reduced-motion — turn off the entry choreography. */
@media (prefers-reduced-motion: reduce) {
  .wf-row, .wf-fill, .wf-frame { animation: none !important; }
  .eyebrow .dot { animation: none; }
}