:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #4ade80;
  --bad: #f87171;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: linear-gradient(160deg, #0f172a, #123047 50%, #0b3b2e);
  color: var(--text);
  min-height: 100vh;
}
.top {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 1.25rem; border-bottom: 1px solid #334155;
}
.brand { color: #fff; font-weight: 700; text-decoration: none; font-size: 1.2rem; }
nav a { color: var(--muted); margin-left: 1rem; text-decoration: none; }
nav a:hover { color: #fff; }
.wrap { max-width: 960px; margin: 0 auto; padding: 1.25rem; }
.card {
  background: rgba(30,41,59,.92); border: 1px solid #334155;
  border-radius: 12px; padding: 1.25rem; margin-bottom: 1rem;
}
h1,h2,h3 { margin-top: 0; }
.muted { color: var(--muted); }
.flash { background: #14532d; border: 1px solid #166534; padding: .75rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.error { background: #7f1d1d; border: 1px solid #991b1b; padding: .75rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
label { display: block; margin: .6rem 0 .25rem; color: var(--muted); font-size: .9rem; }
input, select, button, textarea {
  width: 100%; padding: .7rem .8rem; border-radius: 8px;
  border: 1px solid #475569; background: #0f172a; color: #fff;
}
button, .btn {
  display: inline-block; width: auto; margin-top: .8rem; cursor: pointer;
  background: var(--accent); color: #0f172a; border: 0; font-weight: 700;
  text-decoration: none; padding: .7rem 1rem; border-radius: 8px;
}
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .5rem; border-bottom: 1px solid #334155; }
.code { font-family: ui-monospace, monospace; color: var(--ok); font-size: 1.4rem; }
.grid { display: grid; gap: 1rem; }
@media (min-width: 800px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.hero { padding: 2rem 0; }
.hero h1 { font-size: 2rem; }