:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #4b5563;
  --accent: #0f766e;
  --accent-soft: #ccfbf1;
  --border: #dbe2ea;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #d9f99d 0%, transparent 35%),
    radial-gradient(circle at 90% 15%, #bfdbfe 0%, transparent 35%),
    var(--bg);
  line-height: 1.6;
}

.container {
  width: min(960px, 92vw);
  margin: 2rem auto 4rem;
}

header {
  background: linear-gradient(135deg, #134e4a, #0f766e);
  color: #ffffff;
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 16px 40px rgba(15, 118, 110, 0.2);
}

header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw, 2.2rem);
}

header p {
  margin: 0.5rem 0 0;
  color: #d1fae5;
}

main {
  margin-top: 1rem;
}

.top-nav {
  margin-top: 0.85rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.55rem 0.8rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.top-nav a {
  font-weight: 600;
  text-decoration: none;
}

section,
article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  margin-top: 1rem;
  box-shadow: 0 6px 22px rgba(17, 24, 39, 0.06);
}

h2,
h3 {
  line-height: 1.25;
}

h2 {
  margin-top: 0.2rem;
  color: #0f172a;
}

h3 {
  margin-bottom: 0.4rem;
  color: #134e4a;
}

p,
li {
  color: var(--text);
}

.small {
  color: var(--muted);
  font-size: 0.95rem;
}

a {
  color: var(--accent);
}

a:hover {
  text-decoration-thickness: 2px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.9rem;
}

.card-link {
  display: block;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.95rem;
  text-decoration: none;
  color: inherit;
  background: #f8fffe;
}

.card-link strong {
  display: block;
  margin-bottom: 0.25rem;
  color: #0f172a;
}

.badge {
  display: inline-block;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #065f46;
  font-size: 0.8rem;
  padding: 0.2rem 0.55rem;
}

.notice {
  border-left: 4px solid #0f766e;
  padding-left: 0.8rem;
  color: #0f172a;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.6rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f0fdfa;
}

footer {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}