:root {
  --bg: #0b0f17;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --link: #76e3ff;
  --link-hover: #b7f3ff;
  --accent: #ffcc66;
  --shadow: rgba(0, 0, 0, 0.35);

  --radius: 16px;
  --max: 860px;
  --pad: 18px;
  --pad-lg: 28px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  color: var(--text);
  background:
    radial-gradient(900px 600px at 15% 10%, rgba(118, 227, 255, 0.22), transparent 55%),
    radial-gradient(800px 520px at 82% 20%, rgba(255, 204, 102, 0.18), transparent 55%),
    radial-gradient(1000px 700px at 50% 120%, rgba(255, 255, 255, 0.06), transparent 60%),
    var(--bg);
  font: 16px/1.55 ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

a {
  color: var(--link);
  text-decoration: none;
}
a:hover { color: var(--link-hover); text-decoration: underline; }

header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(11, 15, 23, 0.75);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.brand b {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.2px;
  font-weight: 800;
  white-space: nowrap;
}
.brand span {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

nav a {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
}
nav a:hover {
  color: var(--text);
  border-color: var(--border);
  text-decoration: none;
}

main {
  padding: 26px 0 60px;
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.04));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 14px 40px var(--shadow);
  padding: var(--pad-lg);
}

h1, h2, h3 {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  margin: 0 0 12px;
  line-height: 1.2;
}

h1 { font-size: 30px; }
h2 { font-size: 18px; margin-top: 22px; }

p { margin: 0 0 14px; color: var(--text); }

ul { margin: 0 0 14px 18px; padding: 0; }
li { margin: 6px 0; color: var(--text); }

.muted { color: var(--muted); }

.pill {
  display: inline-block;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 12px;
  letter-spacing: 0.2px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

footer {
  padding-top: 18px;
  border-top: 1px dashed rgba(255, 255, 255, 0.22);
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

pre {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 12px 14px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 0 0 14px;
  color: rgba(255, 255, 255, 0.88);
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 14px;
}

.grid a {
  display: block;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 14px;
  background: rgba(0, 0, 0, 0.14);
}
.grid a:hover {
  background: rgba(0, 0, 0, 0.22);
  text-decoration: none;
}
.grid b {
  display: block;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
}
.grid span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

@media (min-width: 820px) {
  .grid { grid-template-columns: 1fr 1fr; }
}