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

/* ── Tokens ─────────────────────────────────────────────────────── */
:root {
  --bg:        #000000;
  --surface:   #0a0a0a;
  --border:    #1a1a1a;
  --muted:     #3a3a3a;
  --subtle:    #888888;
  --body:      #c8c8c8;
  --heading:   #ffffff;
  --accent:    #ffffff;

  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 18px;

  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  --max-w:     1100px;
  --nav-h:     60px;
}

/* ── Base ────────────────────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--body);
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: var(--heading); text-decoration: none; }
a:hover { opacity: 0.7; }

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

/* ── Nav ─────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--heading);
}

.nav__links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-size: 0.875rem;
  color: var(--subtle);
  font-weight: 500;
  transition: color 0.15s;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--heading);
  opacity: 1;
}

.nav__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--heading);
  padding: 4px;
}

/* ── Hero ─────────────────────────────────────────────────────────── */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: calc(100vh - var(--nav-h));
  padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 5vw, 3rem);
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--subtle);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero__title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--heading);
  margin-bottom: 1.5rem;
}

.hero__sub {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--subtle);
  max-width: 520px;
  line-height: 1.6;
  margin-bottom: 3rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
  border: none;
}

.btn:hover { opacity: 0.85; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--heading);
  color: #000;
}

.btn--ghost {
  background: transparent;
  color: var(--body);
  border: 1px solid var(--border);
}

.btn--ghost:hover { border-color: var(--muted); opacity: 1; }

/* ── Code pill ───────────────────────────────────────────────────── */
.install-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 1rem 0.6rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--body);
  margin-top: 1.5rem;
}

.install-pill__copy {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--subtle);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  font-size: 0.75rem;
}

.install-pill__copy:hover { color: var(--heading); background: var(--border); }

/* ── Feature grid ────────────────────────────────────────────────── */
.features {
  padding: clamp(4rem, 8vw, 7rem) clamp(1.5rem, 5vw, 3rem);
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--subtle);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 3rem;
}

.feature-card {
  background: var(--bg);
  padding: 2rem;
  transition: background 0.2s;
}

.feature-card:hover { background: var(--surface); }

.feature-card__icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.feature-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 0.5rem;
}

.feature-card__body {
  font-size: 0.875rem;
  color: var(--subtle);
  line-height: 1.6;
}

/* ── Section heading ─────────────────────────────────────────────── */
.section-heading {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--heading);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

/* ── Generic page ────────────────────────────────────────────────── */
.page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1.5rem, 5vw, 3rem);
}

.page__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--heading);
  margin-bottom: 1rem;
  line-height: 1.05;
}

.page__lead {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--subtle);
  max-width: 560px;
  margin-bottom: 3rem;
  line-height: 1.6;
}

/* ── Docs layout ─────────────────────────────────────────────────── */
.docs-wrap {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto;
  min-height: calc(100vh - var(--nav-h));
}

.docs-sidebar {
  border-right: 1px solid var(--border);
  padding: 2rem 1.5rem;
  position: sticky;
  top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
}

.docs-sidebar::-webkit-scrollbar { width: 4px; }
.docs-sidebar::-webkit-scrollbar-track { background: transparent; }
.docs-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.docs-sidebar__title {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--subtle);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  padding-left: 0.5rem;
}

.docs-nav { list-style: none; }

.docs-nav__section {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem;
  margin-top: 1.5rem;
  margin-bottom: 0.25rem;
}

.docs-nav__link {
  display: block;
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--subtle);
  transition: color 0.15s, background 0.15s;
  line-height: 1.4;
}

.docs-nav__link:hover { color: var(--heading); background: var(--surface); opacity: 1; }
.docs-nav__link.active { color: var(--heading); background: var(--surface); }

.docs-content {
  padding: 3rem clamp(1.5rem, 4vw, 3rem);
  min-width: 0;
}

/* ── Prose ────────────────────────────────────────────────────────── */
.prose { max-width: 68ch; }

.prose h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--heading);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.prose h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--heading);
  letter-spacing: -0.02em;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}

.prose h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--heading);
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.prose p { margin-bottom: 1rem; color: var(--body); }

.prose ul, .prose ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--body);
}

.prose li { margin-bottom: 0.25rem; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.15em 0.4em;
  color: var(--heading);
}

.prose pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.prose pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
  color: var(--body);
}

.prose blockquote {
  border-left: 2px solid var(--muted);
  padding-left: 1.25rem;
  color: var(--subtle);
  font-style: italic;
  margin: 1.5rem 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}

.prose th {
  text-align: left;
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--heading);
  font-weight: 600;
}

.prose td {
  padding: 0.6rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--body);
}

.prose a { color: var(--heading); border-bottom: 1px solid var(--muted); }
.prose a:hover { border-color: var(--heading); opacity: 1; }

/* ── Downloads ───────────────────────────────────────────────────── */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color 0.15s;
}

.download-card:hover { border-color: var(--muted); }

.download-card__os {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--subtle);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.download-card__name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 0.375rem;
}

.download-card__meta {
  font-size: 0.8rem;
  color: var(--subtle);
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
}

/* ── Footer ──────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem clamp(1.5rem, 5vw, 3rem);
  margin-top: auto;
}

.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--subtle);
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer__links a {
  font-size: 0.8rem;
  color: var(--subtle);
  transition: color 0.15s;
}

.footer__links a:hover { color: var(--heading); opacity: 1; }

/* ── Mobile ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__links.open { display: flex; flex-direction: column; gap: 0; position: fixed; top: var(--nav-h); left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 1rem 0; }
  .nav__links.open a { padding: 0.75rem 2rem; }
  .nav__menu-btn { display: block; }

  .docs-wrap { grid-template-columns: 1fr; }
  .docs-sidebar { display: none; position: static; height: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .docs-sidebar.open { display: block; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
}