:root {
  color-scheme: light;
  --navy: #17365f;
  --blue: #215f9a;
  --teal: #167d88;
  --ink: #1d2939;
  --muted: #667085;
  --line: #d7e1ec;
  --surface: #ffffff;
  --background: #f5f8fb;
  --warning: #fff7e6;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  color: var(--ink);
  background: var(--background);
}
a { color: var(--blue); font-weight: 650; text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; }
.shell { max-width: 900px; margin: 0 auto; padding: 32px 20px 56px; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}
.brand { color: var(--navy); font-size: 18px; font-weight: 800; }
.mark { display: inline-flex; gap: 4px; align-items: center; }
.mark::before, .mark::after { content: ""; display: block; height: 4px; border-radius: 9px; }
.mark::before { width: 28px; background: var(--teal); }
.mark::after { width: 18px; background: var(--navy); }
nav { display: flex; flex-wrap: wrap; gap: 12px 18px; font-size: 14px; }
main {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(24px, 5vw, 48px);
  box-shadow: 0 14px 40px rgba(23, 54, 95, 0.07);
}
h1, h2, h3 { color: var(--navy); line-height: 1.22; }
h1 { margin: 0 0 8px; font-size: clamp(30px, 5vw, 42px); }
h2 { margin: 34px 0 12px; font-size: 22px; }
h3 { margin: 24px 0 8px; font-size: 17px; }
p, li { font-size: 15px; }
ul, ol { padding-left: 23px; }
.subtitle { margin: 0 0 4px; color: var(--muted); }
.notice, .card, .warning { border-radius: 12px; padding: 18px; margin: 20px 0; }
.notice, .card { background: #f7fbff; border: 1px solid var(--line); }
.notice { border-left: 5px solid var(--teal); }
.warning { background: var(--warning); border: 1px solid #efd596; }
.notice > :first-child, .card > :first-child, .warning > :first-child { margin-top: 0; }
.notice > :last-child, .card > :last-child, .warning > :last-child { margin-bottom: 0; }
.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  color: #fff;
  background: var(--navy);
  font-weight: 800;
}
.button:hover, .button:focus-visible { background: var(--blue); text-decoration: none; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin: 18px 0; min-width: 560px; }
th, td { padding: 11px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; vertical-align: top; }
th { background: #edf3f8; color: var(--navy); }
.deleted { color: #9c1830; font-weight: 750; }
.retained { color: #7b5600; font-weight: 750; }
footer { margin-top: 32px; color: var(--muted); font-size: 13px; text-align: center; }
footer p { font-size: 13px; }
@media (max-width: 640px) {
  .topbar { align-items: flex-start; flex-direction: column; }
  .shell { padding: 20px 12px 36px; }
  main { border-radius: 14px; padding: 24px 18px; }
  .table-wrap { overflow: visible; }
  table, tbody, tr, td { display: block; width: 100%; }
  table { min-width: 0; }
  table tr:first-child { display: none; }
  table tr {
    margin: 14px 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #f7fbff;
  }
  table td { padding: 0; border: 0; }
  table td + td { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
  table td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 3px;
    color: var(--navy);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
}