:root {
  --bg: #0b1020;
  --panel: #141b34;
  --panel-2: #1b2547;
  --text: #eef2ff;
  --muted: #aab4d6;
  --accent: #7aa2ff;
  --border: #2c3a6b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: radial-gradient(circle at 10% 10%, #162244, var(--bg) 50%);
  color: var(--text);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
}

.hero {
  margin-bottom: 1rem;
}

h1, h2 {
  margin: 0 0 0.6rem;
}

p {
  margin: 0.4rem 0;
  color: var(--muted);
}

.hint code {
  color: var(--text);
  background: #0f1730;
  padding: 0.15rem 0.35rem;
  border-radius: 0.3rem;
}

.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  margin-top: 1rem;
}

.links a {
  color: var(--accent);
  margin-right: 1rem;
  text-decoration: none;
}

.links a:hover {
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.8rem;
  font-size: 0.95rem;
}

th, td {
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 0.55rem 0.45rem;
}

th {
  color: var(--muted);
  font-weight: 600;
}