/* Piren landing page.
 *
 * The palette and design tokens intentionally mirror the integrated web UI
 * (public/style.css) so the landing page and the gateway web UI read as one
 * brand: same dark base, same purple accent, same borders, same monospace
 * touches. The landing page only adds the layout, spacing, and sections a
 * marketing page needs. */

:root {
  /* Mirrored from public/style.css */
  --bg: #0f0f17;
  --bg-panel: #181828;
  --bg-input: #1e1e30;
  --text: #c8c8d8;
  --text-bright: #e8e8f0;
  --text-muted: #6b6b80;
  --accent: #7c6ff0;
  --accent-hover: #9488f5;
  --green: #4ade80;
  --red: #f87171;
  --border: #252538;
  --yellow: #fbbf24;

  /* Logo accent colors, reused for subtle highlights */
  --orb-orange: #d85a30;
  --orb-purple: #7f77dd;
  --orb-green: #1d9e75;
  --orb-blue: #378add;

  --mono: "SF Mono", "JetBrains Mono", Monaco, "Cascadia Code", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --maxw: 1040px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent-hover); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---- Nav ---- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 23, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.5rem;
  max-width: var(--maxw);
  margin: 0 auto;
}
.nav-brand {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: -0.3px;
}
.nav-links { display: flex; gap: 1.75rem; align-items: center; }
.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text-bright); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.3rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  font-family: inherit;
}
.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-hover); color: white; }
.btn-secondary {
  background: var(--bg-input);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--text-bright); }

/* ---- Hero ---- */
.hero {
  text-align: center;
  padding: 5rem 1.5rem 4rem;
}
.hero-logo {
  width: min(420px, 80vw);
  height: auto;
  margin: 0 auto 1rem;
  display: block;
  overflow: visible;
}
/* One-shot intro + continuous orbit. Scoped to the hero so they never
 * collide with the gateway web UI's own logo animation. */
.hero-logo .hdot1 { animation: hOrbit1 4.4s linear infinite; transform-origin: 0 0; }
.hero-logo .hdot2 { animation: hOrbit2 6.3s linear infinite; transform-origin: 0 0; }
.hero-logo .hdot3 { animation: hOrbit3 3.6s linear infinite reverse; transform-origin: 0 0; }
.hero-logo .hdot4 { animation: hOrbit4 8.2s linear infinite; transform-origin: 0 0; }
.hero-logo .hring1 { animation: hTrail1 4.4s linear infinite; }
.hero-logo .hring2 { animation: hTrail2 6.3s linear infinite; }
.hero-logo .hring3 { animation: hTrail3 3.6s linear infinite reverse; }
@keyframes hOrbit1 { from { transform: rotate(0deg) translateX(88px) rotate(0deg); } to { transform: rotate(360deg) translateX(88px) rotate(-360deg); } }
@keyframes hOrbit2 { from { transform: rotate(140deg) translateX(114px) rotate(-140deg); } to { transform: rotate(500deg) translateX(114px) rotate(-500deg); } }
@keyframes hOrbit3 { from { transform: rotate(260deg) translateX(68px) rotate(-260deg); } to { transform: rotate(620deg) translateX(68px) rotate(-620deg); } }
@keyframes hOrbit4 { from { transform: rotate(50deg) translateX(138px) rotate(-50deg); } to { transform: rotate(410deg) translateX(138px) rotate(-410deg); } }
@keyframes hTrail1 { from { stroke-dashoffset: 0; } to { stroke-dashoffset: -553; } }
@keyframes hTrail2 { from { stroke-dashoffset: 0; } to { stroke-dashoffset: 716; } }
@keyframes hTrail3 { from { stroke-dashoffset: 0; } to { stroke-dashoffset: -427; } }
@media (prefers-reduced-motion: reduce) {
  .hero-logo .hdot1, .hero-logo .hdot2, .hero-logo .hdot3, .hero-logo .hdot4,
  .hero-logo .hring1, .hero-logo .hring2, .hero-logo .hring3 { animation: none; }
}
.hero-tagline {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 600;
  color: var(--text-bright);
  line-height: 1.25;
  letter-spacing: -0.5px;
  max-width: 700px;
  margin: 0 auto 1rem;
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 2.25rem;
}
.hero-actions {
  display: flex;
  gap: 0.85rem;
  justify-content: center;
  flex-wrap: wrap;
}
.install-line {
  margin-top: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 0.55rem 0.95rem;
  border-radius: 6px;
}
.install-line .prompt { color: var(--accent); }
.install-line code { color: var(--green); }

/* ---- Section scaffolding ---- */
section { padding: 4rem 0; }
.section-title {
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--text-bright);
  text-align: center;
  margin-bottom: 0.6rem;
  letter-spacing: -0.4px;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 2.75rem;
  font-size: 1rem;
}

/* ---- Philosophy pillars ---- */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}
.pillar {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.6rem 1.4rem;
  transition: border-color 0.15s, transform 0.15s;
}
.pillar:hover { border-color: var(--accent); transform: translateY(-2px); }
.pillar-icon {
  font-size: 1.5rem;
  margin-bottom: 0.65rem;
  display: block;
}
.pillar h3 {
  font-size: 1.05rem;
  color: var(--text-bright);
  margin-bottom: 0.4rem;
}
.pillar p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.55; }

/* ---- Features grid ---- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.feature {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4rem;
}
.feature h3 {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
  font-weight: 600;
}
.feature p { font-size: 0.9rem; color: var(--text-muted); }

/* ---- Comparison ---- */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.compare-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.6rem;
}
.compare-card h3 {
  font-size: 1.05rem;
  color: var(--text-bright);
  margin-bottom: 0.3rem;
}
.compare-card .compare-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}
.compare-card p { font-size: 0.9rem; color: var(--text); line-height: 1.6; }
.compare-card .vs-note {
  margin-top: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  font-size: 0.86rem;
  color: var(--text-muted);
}
.compare-card .vs-note strong { color: var(--green); font-weight: 600; }

/* ---- Architecture block ---- */
.arch {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.6rem;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--text);
  overflow-x: auto;
}
.arch .a-steward { color: var(--yellow); }
.arch .a-piren { color: var(--accent); font-weight: 600; }
.arch .a-pi { color: var(--orb-green); }
.arch .a-vault { color: var(--orb-blue); }
.arch .a-arrow { color: var(--text-muted); }

/* ---- Quick start ---- */
.quickstart {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem 1.6rem;
  max-width: 640px;
  margin: 0 auto;
}
.quickstart .step {
  display: flex;
  gap: 0.85rem;
  align-items: baseline;
  padding: 0.45rem 0;
}
.quickstart .step-num {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  min-width: 1.5rem;
}
.quickstart code, .quickstart .cmd {
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--green);
}

/* ---- Screenshot ---- */
.screenshot-wrap {
  max-width: 880px;
  margin: 0 auto;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
.screenshot-wrap img {
  display: block;
  width: 100%;
  height: auto;
}
.screenshot-caption {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.85rem;
}

/* ---- Knowledge ladder ---- */
.ladder {
  max-width: 620px;
  margin: 0 auto 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.ladder-step {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.9rem;
}
.ladder-step .ladder-layer {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  min-width: 96px;
  font-weight: 600;
}
.ladder-step .ladder-desc { color: var(--text-muted); }
.ladder-arrow {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1;
}

/* ---- Vault tree + team example (two-column) ---- */
.practice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  align-items: start;
}
.practice-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.4rem;
}
.practice-card h3 {
  font-size: 1rem;
  color: var(--text-bright);
  margin-bottom: 0.7rem;
}
.vault-tree, .agent-list {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre;
  overflow-x: auto;
}
.vault-tree .t-dir { color: var(--accent); }
.vault-tree .t-file { color: var(--text-muted); }
.vault-tree .t-comment { color: var(--orb-green); }
.agent-list .a-name { color: var(--yellow); font-weight: 600; }
.agent-list .a-role { color: var(--text-muted); }

/* ---- Footer links with icons ---- */
.footer-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  margin-bottom: 1rem;
  align-items: center;
}
.footer-links a {
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
}
.footer-links a:hover { color: var(--text-bright); }
.footer-links svg { width: 18px; height: 18px; fill: currentColor; }

/* ---- Footer ---- */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  text-align: center;
}
footer p { color: var(--text-muted); font-size: 0.88rem; }
footer .footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .nav-links { gap: 1.1rem; }
  .nav-links a:nth-child(n+3) { display: none; }
  .hero { padding: 3.5rem 1rem 2.5rem; }
  section { padding: 3rem 0; }
  .install-line { font-size: 0.78rem; }
  .practice-grid { grid-template-columns: 1fr; }
}

/* Scrollbar (mirrors web UI) */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}