:root {
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --line: #e5e7eb;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --radius: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: linear-gradient(180deg, #f9fbff 0%, var(--bg) 60%);
  color: var(--text);
  line-height: 1.65;
}

.wrap {
  width: min(980px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.brand img { width: 34px; height: 34px; object-fit: contain; }

.back {
  text-decoration: none;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  padding: .55rem .95rem;
  font-size: .9rem;
  font-weight: 600;
}

.back:hover { background: var(--accent-dark); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 2rem);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .06);
}

h1 {
  margin: 0 0 .6rem;
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  line-height: 1.2;
}

h2 {
  margin: 1.6rem 0 .4rem;
  font-size: 1.12rem;
}

p, li { color: var(--muted); }
ul { margin: .45rem 0 .8rem; padding-left: 1.15rem; }
.meta { font-size: .92rem; color: #6b7280; margin-bottom: .6rem; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: .75rem;
  font-size: .92rem;
}

th, td {
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: .65rem;
}

th {
  background: #f3f4f6;
  color: #1f2937;
  font-weight: 600;
}

.note {
  margin-top: 1.2rem;
  padding: .8rem .9rem;
  border-radius: 10px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e3a8a;
  font-size: .92rem;
}