:root {
  --bg: #0d0d10;
  --surface: #131316;
  --card: #1b1b21;
  --border: #252530;
  --text: #ddd9d0;
  --muted: #7a7870;
  --orange: #d96d1e;
  --orange-light: #ec8a3f;
  --teal: #2d9e8e;
  --teal-light: #3fbdab;
  --radius: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--orange-light);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

/* Nav */
nav {
  position: sticky;
  top: 0;
  background: rgba(13, 13, 16, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  /* needed for mobile dropdown positioning */
  isolation: isolate;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
}

.nav-brand:hover { text-decoration: none; }

.nav-brand img {
  width: 28px;
  height: 28px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.15s;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.15s;
}

.nav-github:hover {
  border-color: var(--muted);
  color: var(--text);
  text-decoration: none;
}

.nav-hamburger {
  display: none;
  appearance: none;
  -webkit-appearance: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  margin: 0;
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  line-height: inherit;
  cursor: pointer;
  transition: border-color 0.15s;
}

.nav-hamburger:hover {
  border-color: var(--muted);
}

.nav-mobile-menu {
  display: none;
  position: absolute;
  top: 61px;
  right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 160px;
  z-index: 200;
  padding: 6px 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.nav-mobile-menu.open {
  display: block;
}

.nav-mobile-menu a {
  display: block;
  padding: 10px 16px;
  color: var(--muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.15s;
}

.nav-mobile-menu a:hover,
.nav-mobile-menu a.active {
  color: var(--text);
  text-decoration: none;
}

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Sections — no global border; use sibling selectors so first section is always clean */
section {
  padding: 64px 0;
}

/* Border between consecutive sections in the same container */
section + section {
  border-top: 1px solid var(--border);
}

/* First section in the second container on the homepage (follows .demo-section) */
.demo-section + .container > section:first-child {
  border-top: 1px solid var(--border);
}

/* First section on inner pages follows .page-hero which already has a border-bottom */
.page-hero + section {
  padding-top: 40px;
}

/* Hero */
.hero {
  padding: 80px 0 72px;
  text-align: center;
}

.hero-icon {
  width: 88px;
  height: 88px;
  margin-bottom: 24px;
  border-radius: 16px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 520px;
  margin: 0 auto 36px;
}

/* Smart download block */
.dl-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

#dl-primary-linux {
  display: none;
}

.dl-alts {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--muted);
  flex-wrap: wrap;
  justify-content: center;
}

.dl-dot {
  color: var(--border);
  user-select: none;
}

.dl-alt-win {
  display: none;
}

.link-subtle {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.link-subtle:hover {
  color: var(--text);
  text-decoration: none;
}

/* Buttons */
.btn-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.1s;
  white-space: nowrap;
  line-height: 1;
}

.btn:hover {
  opacity: 0.85;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--orange);
  color: #fff;
}

.btn-secondary {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

/* Demo section — full width, centered content */
.demo-section {
  padding: 0 0 72px;
  text-align: center;
}

.demo-gif {
  max-width: 520px;
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

/* Section headings */
h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--muted);
  margin-bottom: 40px;
  font-size: 1rem;
}

/* Feature cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-icon {
  font-size: 22px;
  color: var(--orange-light);
  margin-bottom: 14px;
  display: block;
}

h3 {
  font-size: 0.975rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Steps (how it works) */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 36px;
  counter-reset: steps;
}

.step {
  position: relative;
  padding-left: 48px;
}

.step::before {
  counter-increment: steps;
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 2px;
  width: 30px;
  height: 30px;
  background: var(--orange);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.8rem;
  text-align: center;
  line-height: 30px;
}

.step h3 { margin-bottom: 6px; }

.step p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

/* FAQ list */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
}

/* When faq-list is used on the FAQ page (full-width intent) */
.faq-page .faq-list {
  max-width: 800px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.faq-item h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.faq-item p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

.faq-item p + p {
  margin-top: 8px;
}

.faq-item ul {
  padding-left: 20px;
  margin-top: 8px;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.8;
}

/* CTA section */
.cta-section {
  text-align: center;
}

.cta-section h2 { margin-bottom: 10px; }

.cta-section p {
  color: var(--muted);
  margin-bottom: 28px;
}

/* Platform cards (download page) */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.platform-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
}

.platform-card h3 {
  font-size: 1.05rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.platform-card ol {
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.9;
  flex: 1;
}

.platform-card .btn {
  margin-top: 20px;
  align-self: flex-start;
}

/* Code */
code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.85em;
  font-family: 'Cascadia Code', 'JetBrains Mono', 'Fira Code', monospace;
  color: var(--teal-light);
}

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text);
  margin: 12px 0;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* Notices */
.notice {
  background: rgba(45, 158, 142, 0.1);
  border: 1px solid rgba(45, 158, 142, 0.28);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: 16px;
  color: var(--text);
}

.notice.warn {
  background: rgba(217, 109, 30, 0.1);
  border-color: rgba(217, 109, 30, 0.3);
}

/* Page hero (inner pages) */
.page-hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--muted);
  font-size: 1rem;
  max-width: 600px;
}

/* Setup guide steps */
.guide-step {
  display: flex;
  gap: 20px;
  margin-bottom: 36px;
}

.guide-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--orange);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  margin-top: 2px;
}

.guide-content h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.guide-content p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
}

.guide-content p + p {
  margin-top: 8px;
}

.guide-content ul,
.guide-content ol {
  padding-left: 20px;
  margin-top: 8px;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.8;
}

.guide-content li { margin-bottom: 4px; }

/* Config table */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.config-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 480px;
}

.config-table th,
.config-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.config-table tbody tr:last-child td {
  border-bottom: none;
}

.config-table th {
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.config-table td:first-child {
  color: var(--teal-light);
  white-space: nowrap;
}

/* Section heading above a table */
.table-label {
  font-size: 1rem;
  font-weight: 600;
  margin: 32px 0 12px;
}

/* Version badge */
.version-badge {
  display: inline-block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 12px;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 20px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner a {
  color: var(--muted);
  text-decoration: none;
}

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

.footer-disclaimer {
  font-size: 0.78rem;
  opacity: 0.65;
  margin-top: 8px;
}

/* Responsive */
@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .nav-github-label {
    display: none;
  }

  .nav-github {
    padding: 6px 10px;
  }

  .nav-hamburger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .hero {
    padding: 52px 0 52px;
  }

  .hero-icon {
    width: 68px;
    height: 68px;
  }

  .btn {
    font-size: 0.875rem;
    padding: 11px 18px;
  }

  section { padding: 48px 0; }

  .guide-step {
    flex-direction: column;
    gap: 10px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .platform-card .btn {
    align-self: stretch;
    justify-content: center;
  }
}