:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e2e8f0;
  --accent: #f59e0b;
  --muted: #94a3b8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Verdana", sans-serif;
  background: radial-gradient(circle at top left, #1e293b, #0f172a 45%, #020617 100%);
  color: var(--text);
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(2, 6, 23, 0.9);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  z-index: 10;
}

.site-header .brand {
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-header a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-header a:hover {
  color: var(--accent);
}

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.banner {
  background: #b91c1c;
  color: white;
  padding: 10px 14px;
  border-radius: 6px;
  font-weight: 700;
  margin-bottom: 20px;
}

.card {
  background: var(--card);
  border: 1px solid rgba(148, 163, 184, 0.2);
  padding: 18px;
  border-radius: 10px;
  margin-bottom: 16px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
}

.btn {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--accent);
  color: #111827;
  font-weight: 700;
  text-decoration: none;
  margin-top: 8px;
}

pre {
  background: #020617;
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  border: 1px solid rgba(148, 163, 184, 0.2);
}

input, textarea, select {
  width: 100%;
  background: #0b1224;
  color: var(--text);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 8px 10px;
  border-radius: 6px;
  margin-top: 6px;
}

label {
  display: block;
  margin-top: 12px;
}

button {
  margin-top: 12px;
  background: var(--accent);
  color: #111827;
  border: 0;
  padding: 8px 14px;
  font-weight: 700;
  border-radius: 6px;
  cursor: pointer;
}

.site-footer {
  text-align: center;
  color: var(--muted);
  padding: 20px 0 40px;
}

@media (max-width: 720px) {
  .site-header nav {
    flex-direction: column;
    align-items: flex-start;
  }
}