:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #f59e0b;
  --code-bg: #f1f5f9;
  --card-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --fg: #e2e8f0;
    --muted: #94a3b8;
    --border: #1e293b;
    --code-bg: #1e293b;
    --card-bg: #1e293b;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
}

a { color: inherit; }

main, .site-header, footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  padding-bottom: 20px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-weight: 600;
  color: var(--accent);
}

.brand span { color: var(--fg); }

nav { display: flex; gap: 20px; }

nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
}

nav a:hover { color: var(--fg); }

.hero {
  padding-top: 64px;
  padding-bottom: 24px;
  text-align: center;
}

.hero h1 {
  font-size: 44px;
  margin: 0 0 16px;
  line-height: 1.15;
}

.tagline {
  font-size: 18px;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
}

.install { padding: 32px 0; }

.tabs {
  max-width: 640px;
  margin: 0 auto;
}

.tabs input[type="radio"] { display: none; }

.tabs label {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 14px;
  color: var(--muted);
  background: var(--bg);
}

.tabs label:first-of-type { border-radius: 6px 0 0 6px; }
.tabs label:nth-of-type(2) { border-radius: 0 6px 6px 0; margin-left: -1px; }

.tabs input:checked + label {
  background: var(--accent);
  color: #0f172a;
  border-color: var(--accent);
}

.tab-content { display: none; margin-top: 12px; position: relative; }

#tab-unix:checked ~ .tab-unix,
#tab-win:checked ~ .tab-win { display: block; }

.tab-content pre {
  background: var(--code-bg);
  padding: 16px 56px 16px 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 0;
}

.tab-content code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 14px;
}

.copy {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
}

.copy:hover { color: var(--fg); }

.hint {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-top: 16px;
}

.hint code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
}

.features { padding: 48px 0; }

.features h2 {
  text-align: center;
  font-size: 28px;
  margin: 0 0 32px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  background: var(--card-bg);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.screenshot-section {
  padding: 32px 0;
  display: flex;
  justify-content: center;
}

.screenshot-frame {
  max-width: 880px;
  width: 100%;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 20px 50px -20px rgba(15, 23, 42, 0.25);
  border: 1px solid var(--border);
}

.window-chrome {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: var(--code-bg);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-r { background: #ef4444; }
.dot-y { background: #f59e0b; }
.dot-g { background: #10b981; }

.screenshot-frame img { display: block; width: 100%; }

.downloads { padding: 48px 0; }

.downloads > p {
  color: var(--muted);
  margin: 0 0 16px;
}

.downloads table {
  width: 100%;
  border-collapse: collapse;
}

.downloads th, .downloads td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.downloads th {
  color: var(--muted);
  font-weight: 500;
}

.note {
  margin-top: 24px;
  padding: 12px 16px;
  background: var(--code-bg);
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
}

.note strong { color: var(--fg); }

footer {
  padding: 32px 24px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  nav { gap: 12px; }
}

.download {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.dl-btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  background: var(--fg);
  color: var(--bg);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}

.dl-btn:hover { opacity: 0.85; }

.dl-sub {
  margin-top: 10px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

.downloads details { margin-top: 8px; }

.downloads summary {
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 0;
}