/* ─────────────────────────────────────────────────────────────
   DPlex — landing page styles
   Dark, polished, fully responsive. No framework, no preprocessor.
   ───────────────────────────────────────────────────────────── */

:root {
  --bg: #0b0c0f;
  --bg-elev: #14161a;
  --bg-card: #181a1f;
  --bg-card-hover: #1d2025;
  --border: #23262d;
  --border-strong: #353941;
  --text: #ecedef;
  --text-muted: #a1a5ad;
  --text-dim: #6f747d;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-soft: rgba(59, 130, 246, 0.12);
  --accent-glow: rgba(59, 130, 246, 0.28);
  --green: #22c55e;
  --amber: #f59e0b;
  --purple: #a78bfa;
  --red: #ef4444;
  --radius: 10px;
  --radius-lg: 14px;
  --max: 1120px;
  --shadow-card: 0 2px 4px rgba(0, 0, 0, 0.18);
  --shadow-hero: 0 30px 80px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(59, 130, 246, 0.08);
  --transition: 140ms cubic-bezier(0.2, 0.6, 0.2, 1);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background: radial-gradient(1200px 600px at 50% -120px, rgba(59, 130, 246, 0.08), transparent 70%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, system-ui,
    'Helvetica Neue', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

code,
pre {
  font-family: 'JetBrains Mono', 'SF Mono', ui-monospace, Menlo, Consolas, monospace;
  font-size: 13px;
}

pre {
  background: #0a0b0d;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0;
  color: #d4d4d4;
  white-space: pre;
  -webkit-overflow-scrolling: touch;
  position: relative;
}

code:not(pre code) {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  color: var(--text);
}

img,
svg {
  max-width: 100%;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Skip link ────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: white;
  padding: 8px 14px;
  border-radius: 6px;
  font-weight: 600;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  text-decoration: none;
  color: white;
}

/* ── Navbar ───────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  background: rgba(11, 12, 15, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  padding: 12px 0;
}
.nav-row {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: nowrap;
}
.brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.brand:hover {
  color: var(--text);
  text-decoration: none;
}
.brand .dot {
  display: inline-block;
  width: 22px;
  height: 22px;
  margin-right: 10px;
  background: url('./icon.svg') center/contain no-repeat;
  vertical-align: -6px;
}

.nav-links {
  display: flex;
  gap: 22px;
  margin-left: auto;
  align-items: center;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}
.nav-links a.current {
  color: var(--text);
}

.nav-cta {
  background: var(--accent);
  color: white !important;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--accent-hover);
  text-decoration: none !important;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle:hover {
  background: var(--bg-elev);
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  padding: 80px 0 56px;
  text-align: center;
}
.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.badge a {
  color: inherit;
  font-weight: 600;
}
.hero h1 {
  font-size: clamp(32px, 5.2vw, 56px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 auto 20px;
  max-width: 800px;
}
.hero h1 .accent {
  color: var(--accent);
  background: linear-gradient(90deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .lede {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.55;
}
.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
  cursor: pointer;
  text-decoration: none !important;
}
.btn-primary {
  background: var(--accent);
  color: white !important;
  box-shadow: 0 6px 18px var(--accent-glow);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--bg-elev);
  color: var(--text) !important;
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background: var(--bg-card);
  transform: translateY(-1px);
}
.hero .micro {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 8px;
}

/* ── Hero media ───────────────────────────────────────────── */
.hero-media {
  margin: 56px auto 0;
  max-width: 1000px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-hero);
  background: var(--bg-card);
}
.hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
}

/* ── Sections ─────────────────────────────────────────────── */
/* Scope to direct page sections only — NOT every <section> in the document.
   The changelog page uses nested <section class="release-section"> inside
   each <article>, and a bare `section` selector would inherit the 72px
   page-section padding and break those cards. */
main > section {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
section h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}
section .section-lede {
  color: var(--text-muted);
  font-size: 17px;
  max-width: 680px;
  margin: 0 0 40px;
}

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.feature:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.feature-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}
.feature h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.feature p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.55;
}

/* Screenshot gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.shot {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  display: block;
  color: inherit;
}
.shot:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  text-decoration: none;
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--border);
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
}
.shot .caption {
  padding: 14px 18px;
  font-size: 13.5px;
}
.shot .caption strong {
  color: var(--text);
  display: block;
  margin-bottom: 4px;
}
.shot .caption span {
  color: var(--text-muted);
}

/* Install */
.install-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.install-tab {
  padding: 8px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  font-size: 14px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.install-tab:hover {
  color: var(--text);
}
.install-tab.active {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(59, 130, 246, 0.4);
}
.install-block {
  display: none;
}
.install-block.active {
  display: block;
}
.install-note {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 10px;
}

/* FAQ */
.faq {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  transition: border-color var(--transition);
}
.faq details[open] {
  border-color: var(--border-strong);
}
.faq summary {
  cursor: pointer;
  padding: 16px 22px;
  font-weight: 600;
  font-size: 15.5px;
  letter-spacing: -0.005em;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: '+';
  color: var(--text-dim);
  font-size: 22px;
  line-height: 1;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq details[open] summary::after {
  content: '−';
}
.faq .faq-body {
  padding: 0 22px 18px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.6;
}
.faq .faq-body p {
  margin: 0 0 10px;
}
.faq .faq-body p:last-child {
  margin-bottom: 0;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 60px;
  color: var(--text-dim);
  font-size: 14px;
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-muted);
}

/* Compare table */
.compare {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.compare table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.compare th,
.compare td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.compare th {
  background: var(--bg-elev);
  color: var(--text);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.compare tr:last-child td {
  border-bottom: 0;
}
.compare td:first-child {
  font-weight: 600;
  color: var(--text);
  width: 22%;
}
.compare td:nth-child(2) {
  color: var(--text-muted);
}

/* Privacy callout */
.privacy {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(59, 130, 246, 0.08));
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: var(--radius);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.privacy svg {
  flex-shrink: 0;
  color: var(--green);
}
.privacy h3 {
  margin: 0 0 4px;
  font-size: 17px;
}
.privacy p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14.5px;
}

/* ── What's new (home preview cards) ─────────────────────── */
.whats-new-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.whats-new-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  color: inherit;
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}
.whats-new-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  text-decoration: none;
  transform: translateY(-2px);
}
.whats-new-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.whats-new-version {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.whats-new-date {
  font-size: 13px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.whats-new-tag {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.whats-new-tag--bug-fixes {
  background: rgba(239, 68, 68, 0.12);
  color: var(--red);
}
.whats-new-tag--improvements {
  background: rgba(167, 139, 250, 0.14);
  color: var(--purple);
}
.whats-new-tag--performance {
  background: rgba(34, 197, 94, 0.14);
  color: var(--green);
}
.whats-new-bullets {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.55;
}
.whats-new-bullets li::marker {
  color: var(--text-dim);
}
.whats-new-bullets strong {
  color: var(--text);
}
.whats-new-cta {
  margin: 28px 0 0;
}

/* ── Changelog page ───────────────────────────────────────── */
.changelog-shell {
  padding: 56px 0 80px;
}
.changelog-head h1 {
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
.changelog-head p.lede {
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 0 8px;
  font-size: 17px;
}
.changelog-head .meta {
  color: var(--text-dim);
  font-size: 13.5px;
  margin: 0 0 36px;
}
.changelog-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}
.changelog-toc {
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
  border-left: 1px solid var(--border);
  padding-left: 18px;
}
.changelog-toc h2 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 0 0 12px;
}
.toc {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.toc a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 13.5px;
  transition: background var(--transition), color var(--transition);
}
.toc a:hover {
  background: var(--bg-card);
  color: var(--text);
  text-decoration: none;
}
.toc .toc-version {
  font-weight: 600;
  color: var(--text);
}
.toc .toc-date {
  font-size: 11.5px;
  color: var(--text-dim);
  white-space: nowrap;
}

.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 36px;
  min-width: 0;
}
.release {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 28px 32px;
  scroll-margin-top: 88px;
}
.release-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.release-head h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}
.release-head .anchor {
  color: var(--text-dim);
  font-weight: 400;
  opacity: 0;
  transition: opacity var(--transition);
}
.release:hover .anchor,
.release-head:focus-within .anchor {
  opacity: 1;
}
.release-head .version {
  color: var(--text);
}
.release-date {
  color: var(--text-dim);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.release-section {
  margin-top: 18px;
}
.release-section:first-of-type {
  margin-top: 0;
}
.release-section h3 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 10px;
  color: var(--text-muted);
}
.release-section--features h3 {
  color: var(--accent-hover);
}
.release-section--bug-fixes h3 {
  color: var(--red);
}
.release-section--improvements h3 {
  color: var(--purple);
}
.release-section--performance h3 {
  color: var(--green);
}
.release-section ul {
  margin: 0;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.release-section li {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
}
.release-section li::marker {
  color: var(--text-dim);
}
.release-section strong {
  color: var(--text);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 960px) {
  .changelog-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .changelog-toc {
    position: static;
    max-height: none;
    border-left: 0;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 18px;
    order: 2;
  }
  .toc {
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  main > section {
    padding: 56px 0;
  }
  .hero {
    padding: 56px 0 40px;
  }
  .hero-media {
    margin-top: 40px;
  }
  .gallery {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .release {
    padding: 22px 20px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 18px;
  }

  /* Mobile nav: hide inline links, show toggle */
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 12, 15, 0.97);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 8px 18px 16px;
    display: none;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 12px 4px;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
  }
  .nav-links a:last-of-type {
    border-bottom: 0;
  }
  .nav-links .nav-cta {
    margin-top: 10px;
    justify-content: center;
    padding: 10px 14px;
  }
  .nav-toggle {
    display: inline-flex;
  }

  .hero h1 {
    max-width: 100%;
  }
  .cta-row {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }
  .cta-row .btn {
    justify-content: center;
  }

  pre {
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 12.5px;
    padding: 12px 14px;
  }

  /* Compare table → card rows */
  .compare {
    border: 0;
  }
  .compare table,
  .compare thead,
  .compare tbody,
  .compare tr,
  .compare th,
  .compare td {
    display: block;
    width: 100%;
  }
  .compare thead {
    position: absolute;
    left: -9999px;
  }
  .compare tr {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    padding: 16px 18px;
  }
  .compare td {
    padding: 0;
    border-bottom: 0;
  }
  .compare td:first-child {
    width: auto;
    font-size: 15px;
    margin-bottom: 6px;
  }
  .compare td:nth-child(2) {
    color: var(--text-muted);
    font-size: 14px;
  }

  .privacy {
    flex-direction: column;
    text-align: left;
    align-items: flex-start;
    padding: 20px;
  }
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .footer-links {
    gap: 16px;
  }

  .release {
    padding: 18px 16px;
  }
  .release-head h2 {
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print: hide nav/footer ornament so the docs read cleanly. */
@media print {
  nav,
  footer,
  .changelog-toc {
    display: none;
  }
  body {
    background: white;
    color: black;
  }
}