:root {
  --brand: #8d3045;
  --brand-dark: #6e2536;
  --ink: #1c1c1e;
  --muted: #6b6b70;
  --line: #e8e4e6;
  --bg: #faf8f8;
  --card: #ffffff;
  --maxw: 760px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.topbar .inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topbar img { height: 46px; width: auto; display: block; }
.back {
  color: var(--brand);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  white-space: nowrap;
}
.back:hover { text-decoration: underline; }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.subtitle { color: var(--muted); margin: 0 0 40px; }

h2 {
  font-size: 1.15rem;
  margin: 36px 0 10px;
  padding-top: 8px;
  letter-spacing: -0.01em;
}
h3 { font-size: 1rem; margin: 22px 0 6px; }

p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }

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

.block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px;
  margin: 0 0 20px;
}
.block p:last-child { margin-bottom: 0; }

.muted { color: var(--muted); }

.todo {
  background: #fff6d6;
  border: 1px solid #e8d48a;
  color: #6b5300;
  border-radius: 8px;
  padding: 2px 8px;
  font-size: 0.92em;
  font-weight: 600;
}

footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}
footer a { color: var(--muted); }

html, body { overflow-x: hidden; }

@media (max-width: 520px) {
  .topbar .inner { padding: 14px 18px; }
  .topbar img { height: 38px; }
  .back { font-size: 0.86rem; }
  main { padding: 32px 18px 48px; }
  .block { padding: 18px 18px; }
  h2 { font-size: 1.08rem; }
}