/* OpenPilot marketing site — clean professional dark, not cyberpunk */

:root {
  --bg: #0c0c0c;
  --bg-elevated: #121212;
  --bg-soft: #161616;
  --panel: #1a1a1a;
  --border: #2a2a2a;
  --border-soft: #222;
  --text: #f2f2f2;
  --text-muted: #9a9a9a;
  --text-dim: #6e6e6e;
  --open: #a4aab4;
  --pilot: #ffffff;
  --accent: #d8dde6;
  --ok: #7dcea0;
  --code-kw: #c4b5a0;
  --code-str: #9db8a0;
  --code-num: #b8a88a;
  --code-key: #a8b4c8;
  --code-bool: #c4a0a0;
  --radius: 12px;
  --radius-sm: 8px;
  --shell: 1344px;
  --font: "Outfit", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text);
  background:
    radial-gradient(ellipse 90% 55% at 50% -10%, #1c1c1c 0%, transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

.shell {
  width: min(100% - 2.5rem, var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--text);
  color: var(--bg);
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 64px;
}

.brand-mark {
  height: 30px;
  width: auto;
}

.nav {
  display: flex;
  gap: 1.75rem;
}

.nav a,
.link-quiet {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.2s var(--ease);
}

.nav a:hover,
.link-quiet:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1.25rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav a {
  padding: 0.75rem 0.5rem;
  color: var(--text-muted);
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.mobile-nav a:hover {
  color: var(--text);
  background: var(--bg-soft);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0 1.15rem;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease),
    transform 0.2s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-sm {
  min-height: 36px;
  padding: 0 0.9rem;
  font-size: 0.88rem;
}

.btn-primary {
  background: var(--text);
  color: #111;
}

.btn-primary:hover {
  background: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  border-color: #444;
  background: var(--bg-soft);
}

.btn-disabled,
.btn[aria-disabled="true"] {
  background: var(--bg-soft);
  color: var(--muted);
  border-color: var(--border);
  cursor: not-allowed;
  opacity: 0.72;
  pointer-events: none;
}

.btn-disabled:hover,
.btn[aria-disabled="true"]:hover {
  transform: none;
}

/* Hero */
.hero {
  position: relative;
  padding: 4.5rem 0 3rem;
  overflow: clip;
}

.hero-glow {
  position: absolute;
  inset: 8% 10% auto;
  height: 420px;
  background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.045), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  gap: 3rem;
}

.hero-copy {
  max-width: 720px;
  width: 100%;
  margin-inline: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.hero-brand {
  display: block;
  width: 100%;
  margin: 0 0 1.35rem;
  padding: 0;
  border: 0;
  font-family: "Outfit", system-ui, sans-serif;
  font-size: clamp(2.75rem, 7vw, 4rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
  text-align: center;
}

.brand-open {
  color: #c0c5ce;
}

.brand-pilot {
  color: #ffffff;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.75rem;
  width: 100%;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4.6vw, 3.35rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-weight: 600;
}

.hero-lede {
  margin: 1.15rem auto 0;
  max-width: 560px;
  color: var(--text-muted);
  font-size: 1.08rem;
}

.hero-stage {
  margin-top: 0.5rem;
}

.hero-demo {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #101010;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  position: relative;
}

.hero-demo-media {
  display: block;
  width: 100%;
  height: auto;
}

.hero-demo-static {
  display: none;
}

.hero-demo-video {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .hero-demo-static {
    display: block;
  }

  .hero-demo-video {
    display: none;
  }
}

/* Product screenshots (optional elsewhere) */
.shot-frame {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #101010;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.shot-chrome {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1rem;
  background: #141414;
  border-bottom: 1px solid var(--border-soft);
}

.shot-chrome .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #2f2f2f;
}

.shot-chrome-title {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}

.shot-img,
.feature-shot {
  display: block;
  width: 100%;
  height: auto;
}

.tok-kw {
  color: var(--code-kw);
}

.tok-str {
  color: var(--code-str);
}

.tok-num {
  color: var(--code-num);
}

.tok-key {
  color: var(--code-key);
}

.tok-bool {
  color: var(--code-bool);
}

.feature-visual {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: #0e0e0e;
  overflow: hidden;
}

.feature-shot {
  border-radius: inherit;
}

.how-shot {
  margin-top: 2.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
  max-width: 720px;
}

.models-shot {
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Proof */
.proof {
  padding: 1.5rem 0 2.5rem;
}

.proof-inner {
  text-align: center;
}

.proof-label {
  margin: 0 0 1rem;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 500;
}

.proof-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}

.proof-row span {
  position: relative;
}

.proof-row span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -0.85rem;
  top: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #444;
  transform: translateY(-50%);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.015), transparent);
}

.section-head {
  max-width: 640px;
  margin-bottom: 2.75rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-head h2,
.models-copy h2,
.closing h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.section-lede {
  margin: 0.9rem 0 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.section-lede a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 0.18em;
}

.section-lede a:hover {
  text-decoration-color: var(--text-muted);
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.feature {
  display: grid;
  gap: 1.25rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.feature-wide {
  grid-column: 1 / -1;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2rem;
  padding: 1.75rem;
}

.feature h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.feature-visual {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: #0e0e0e;
  overflow: hidden;
}

.mini-code {
  margin: 0;
  padding: 1rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.6;
  color: #b8bdc8;
  overflow-x: auto;
}

.mini-code .dim {
  color: var(--text-dim);
}

.mini-code .ok {
  color: var(--ok);
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.step {
  display: grid;
  gap: 0.85rem;
  padding: 0.25rem 0;
}

.step-num {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.config-panel {
  margin-top: 2.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  overflow: hidden;
}

.config-label {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-dim);
  font-size: 0.78rem;
  font-weight: 500;
}

.config-code {
  margin: 0;
  padding: 1.15rem 1.25rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: #c8ccd6;
  overflow-x: auto;
}

/* Models */
.models-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.check-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.check-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text-muted);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--text);
}

.model-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  overflow: hidden;
}

.model-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--border-soft);
}

.model-row:last-child {
  border-bottom: 0;
}

.model-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.model-meta {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.75rem;
  align-self: center;
}

/* Download */
.section-download {
  padding-bottom: 4rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.download-card {
  padding: 1.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.download-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #202020;
  color: var(--text);
  margin-bottom: 1.1rem;
}

.download-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.download-card > p {
  margin: 0;
  color: var(--text-muted);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.download-note {
  margin: 1rem 0 0;
  color: var(--text-dim);
  font-size: 0.82rem;
}

/* Closing */
.closing {
  padding: 4.5rem 0 5rem;
  border-top: 1px solid var(--border-soft);
}

.closing-inner {
  text-align: center;
  max-width: 560px;
  margin-inline: auto;
}

.closing-brand {
  width: 160px;
  height: auto;
  margin: 0 auto 1.25rem;
}

.closing p {
  margin: 0.85rem 0 1.5rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
  background: #0a0a0a;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo {
  margin: 0;
  padding: 0;
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  text-align: left;
}

.footer-brand > p:not(.footer-logo) {
  margin: 0.85rem 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
  max-width: 260px;
  text-align: left;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.footer-cols h4 {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 600;
}

.footer-cols a {
  display: block;
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 0.55rem;
  transition: color 0.2s var(--ease);
}

.footer-cols a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-soft);
  color: var(--text-dim);
  font-size: 0.82rem;
}

/* Reveal motion */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Responsive */
@media (max-width: 960px) {
  .nav,
  .link-quiet {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .feature-wide {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .steps,
  .models-layout,
  .download-grid,
  .footer-inner,
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .doc-toc {
    position: static;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.15rem 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-soft);
  }

  .footer-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 1.5rem, var(--shell));
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .footer-cols {
    grid-template-columns: 1fr 1fr;
  }

  .proof-row span:not(:last-child)::after {
    display: none;
  }
}

/* Inner pages (guide, FAQ, changelog, download) */
.page {
  padding-bottom: 2rem;
}

.page-hero {
  padding: 3.5rem 0 1.5rem;
}

.page-hero-inner {
  max-width: 760px;
}

.page-hero h1 {
  margin: 0.35rem 0 0;
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.page-lede {
  margin: 1rem 0 0;
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 560px;
}

.prose-shell {
  max-width: 920px;
}

.prose {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.prose h2 {
  margin: 2.25rem 0 0.75rem;
  color: var(--text);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose p,
.prose li {
  line-height: 1.65;
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

.prose li + li {
  margin-top: 0.45rem;
}

.prose a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 0.18em;
}

.prose a:hover {
  text-decoration-color: var(--text-muted);
}

.prose-narrow {
  margin-top: 3rem;
  max-width: 640px;
}

.prose-cta {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.prose a.btn {
  text-decoration: none;
}

.prose a.btn-primary {
  color: #111;
  background: var(--text);
}

.prose a.btn-primary:hover {
  color: #111;
  background: #fff;
}

.prose a.btn-secondary {
  color: var(--text);
}

.doc-layout {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}

.doc-toc {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 0.35rem;
  padding: 0.85rem 0;
}

.doc-toc-label {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 600;
}

.doc-toc a {
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 0.25rem 0;
}

.doc-toc a:hover {
  color: var(--text);
}

.doc-code {
  margin: 1rem 0;
  padding: 1rem 1.1rem;
  overflow: auto;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: #0e0e0e;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
  color: #c8ccd6;
}

.faq-list {
  display: grid;
  gap: 0.65rem;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 1.15rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--text-dim);
  font-weight: 500;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-answer {
  padding: 0 1.15rem 1.15rem;
  color: var(--text-muted);
}

.faq-answer p {
  margin: 0;
  line-height: 1.65;
}

.change-entry {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-soft);
}

.change-entry:last-of-type {
  border-bottom: 0;
}

.change-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1rem;
  margin-bottom: 0.75rem;
}

.change-meta h2 {
  margin: 0;
}

.change-meta time,
.badge {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.badge {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}

.nav a.is-active {
  color: var(--text);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover {
    transform: none;
  }
}