:root {
  --bg: #0a0a0a;
  --fg: #e4e4e7;
  --muted: #71717a;
  --accent: #60a5fa;
  --accent2: #a78bfa;
  --card: #18181b;
  --border: #27272a;
  --code-bg: #09090b;
  --ok: #4ade80;
}

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

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

/* Header */
header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
}
.hdr-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.6rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--accent);
  text-decoration: none;
}
nav { display: flex; gap: 1.2rem; }
nav a {
  color: var(--muted);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color 0.15s;
}
nav a:hover { color: var(--fg); }

/* Main */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: grid;
  gap: 1.25rem;
}

/* Hero */
.hero-card {
  background: linear-gradient(135deg, var(--card), #1e1b4b);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  text-align: center;
}
.hero-card h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.sm { font-size: 0.8rem; }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}
.card h2 { font-size: 1rem; font-weight: 600; margin-bottom: 0.3rem; }
.card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.75rem; }

/* Forms */
.row { display: flex; gap: 0.5rem; margin-bottom: 0.75rem; flex-wrap: wrap; }

input[type="text"], input[type="number"] {
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 0.7rem;
  font-family: inherit;
  font-size: 0.9rem;
  width: 14rem;
  outline: none;
}
input:focus { border-color: var(--accent); }

button, select {
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 1rem;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s;
}
button:hover, select:hover { border-color: var(--accent); }

select {
  background: var(--code-bg);
  margin-bottom: 0.75rem;
}

/* Code */
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.8rem 1rem;
  overflow-x: auto;
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}

code {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}

/* Table */
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { text-align: left; padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
td:nth-child(3) { color: var(--ok); }

/* Footer */
footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }