:root {
  --bg: #0f1115;
  --card: #171a21;
  --accent: #7dffb3;
  --text: #e7ecf3;
  --muted: #9aa7b2;
  --radius: 14px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: linear-gradient(180deg, #0f1115, #0b0d12);
  color: var(--text);
}
header {
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: sticky;
  top: 0;
  background: rgba(15, 17, 21, 0.95);
  backdrop-filter: blur(10px);
  z-index: 10;
}
.container {
  width: min(100% - 32px, 980px);
  margin: 0 auto;
}
.toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}
.toolbar .left, .toolbar .right {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  background: rgba(255,255,255,0.03);
  text-decoration: none;
  font-weight: 600;
}
.btn.accent {
  border-color: rgba(125,255,179,0.35);
  background: rgba(125,255,179,0.1);
}
select {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 10px;
}
main {
  padding: 28px 0 60px;
}
.article {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 26px;
  line-height: 1.7;
}
.article h1, .article h2, .article h3 { color: #f6fff9; }
.article code {
  background: rgba(0,0,0,0.25);
  padding: 2px 6px;
  border-radius: 6px;
}
.article pre {
  background: rgba(0,0,0,0.35);
  padding: 14px;
  border-radius: 10px;
  overflow: auto;
}
.footer {
  color: var(--muted);
  padding-bottom: 40px;
}