:root {
  color-scheme: dark;
  --bg: #050b14;
  --bg-deep: #030812;
  --bg-elevated: #081321;
  --surface: #0b1726;
  --surface-hover: #101f31;
  --surface-soft: rgba(9, 24, 41, .78);
  --text: #f5f7fb;
  --text-secondary: #a7b4c5;
  --text-muted: #718198;
  --cyan: #00d7f5;
  --blue: #2585ff;
  --violet: #8a52ff;
  --success: #30d890;
  --warning: #ffb84a;
  --error: #ff5364;
  --border: rgba(105, 155, 205, .22);
  --border-strong: rgba(59, 169, 255, .45);
  --accent: linear-gradient(110deg, var(--cyan), var(--blue) 52%, var(--violet));
  --shadow: 0 28px 80px rgba(0, 0, 0, .32);
  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 26px;
  --container: 1440px;
  --content: 780px;
  --header-h: 78px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --space-32: 128px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 82% 8%, rgba(91, 64, 255, .13), transparent 28%),
    radial-gradient(circle at 12% 18%, rgba(0, 215, 245, .08), transparent 25%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 18px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: .38;
  background-image:
    linear-gradient(rgba(67, 137, 206, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(67, 137, 206, .035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}
a { color: inherit; }
a:hover { color: var(--cyan); }
img, svg { max-width: 100%; }
button, input, textarea, select { font: inherit; }
code, pre { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; }
::selection { background: rgba(0, 215, 245, .25); color: var(--text); }

.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  transform: translateY(-150%);
  padding: 10px 14px;
  background: var(--text);
  color: var(--bg);
  border-radius: 8px;
  text-decoration: none;
}
.skip-link:focus { transform: none; }
:focus-visible { outline: 3px solid rgba(0, 215, 245, .85); outline-offset: 4px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 11, 20, .82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px);
}
.header-inner { min-height: var(--header-h); display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: max-content; text-decoration: none; }
.brand img { width: 42px; height: 42px; flex: 0 0 42px; }
.brand-copy { display: flex; align-items: baseline; gap: 5px; font-size: 17px; font-weight: 760; letter-spacing: -.025em; }
.brand-copy strong { font-weight: inherit; }
.brand-copy span { background: var(--accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.desktop-nav { margin-left: auto; display: flex; align-items: center; gap: clamp(18px, 2.4vw, 36px); }
.desktop-nav a, .github-link { color: #dfe8f5; text-decoration: none; font-size: 15px; white-space: nowrap; }
.desktop-nav a[aria-current="page"] { color: var(--cyan); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.github-link { display: inline-flex; align-items: center; gap: 8px; }
.github-link::before { content: "◉"; font-size: 15px; }
.menu-button {
  width: 46px;
  height: 46px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: var(--surface);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  color: var(--text);
}
.menu-button span { width: 20px; height: 2px; background: currentColor; border-radius: 2px; }
.mobile-nav {
  border-top: 1px solid var(--border);
  padding: 12px 24px 22px;
  background: rgba(5, 11, 20, .97);
}
.mobile-nav a { display: block; padding: 12px 0; color: var(--text-secondary); text-decoration: none; border-bottom: 1px solid rgba(105, 155, 205, .11); }

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--border-strong);
  border-radius: 13px;
  color: var(--text);
  font-size: 16px;
  font-weight: 720;
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); color: var(--text); }
.button--primary { border-color: transparent; background: var(--accent); box-shadow: 0 12px 34px rgba(55, 94, 255, .2); }
.button--ghost { background: rgba(7, 18, 31, .72); }
.button--small { min-height: 44px; padding: 10px 18px; font-size: 15px; }
.text-link { color: var(--cyan); font-weight: 700; text-decoration: none; }