:root {
  color-scheme: light;
  --paper: #f5f0e7;
  --ink: #171717;
  --accent: #be371f;
  --muted: #625d56;
  --line: rgba(23, 23, 23, 0.24);
  --panel: #fffdf8;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

a { color: var(--accent); text-underline-offset: 0.18em; }

.shell { width: min(880px, calc(100% - 32px)); margin: 0 auto; }

header {
  border-bottom: 1px solid var(--ink);
  padding: 18px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
}

.mark {
  width: 34px;
  height: 26px;
  border: 2px solid var(--ink);
  position: relative;
  background: #fff;
}

.mark::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: -8px;
  width: 10px;
  height: 10px;
  background: #fff;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: skewY(34deg);
}

nav { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 12px; }
nav a { color: var(--ink); font-size: 0.92rem; font-weight: 700; }

main { padding: 56px 0 72px; }

.hero { border-bottom: 2px solid var(--ink); padding-bottom: 36px; margin-bottom: 36px; }
.eyebrow { color: var(--accent); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.12em; }
h1 { font-size: clamp(2rem, 7vw, 4.2rem); line-height: 1.08; margin: 12px 0 18px; }
h2 { font-size: 1.45rem; line-height: 1.35; margin: 42px 0 12px; }
h3 { font-size: 1.1rem; margin: 26px 0 6px; }
p, li { font-size: 1rem; }
.lead { font-size: 1.15rem; max-width: 46rem; }
.meta, .note { color: var(--muted); font-size: 0.9rem; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.panel { background: var(--panel); border: 1px solid var(--ink); padding: 24px; }
.panel h2 { margin-top: 0; }

.button {
  display: inline-block;
  min-height: 48px;
  padding: 10px 18px;
  border: 1px solid var(--ink);
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

.button.secondary { background: transparent; color: var(--ink); }
.language { margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--line); }
.warning { border-left: 5px solid var(--accent); background: var(--panel); padding: 14px 18px; }
footer { border-top: 1px solid var(--ink); padding: 24px 0 44px; color: var(--muted); font-size: 0.86rem; }

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  main { padding-top: 38px; }
  .panel { padding: 20px; }
}