:root {
  color-scheme: light dark;
  --bg: #fff8f8;
  --surface: #fff;
  --surface-soft: #fff0f3;
  --ink: #4a2630;
  --muted: #765d64;
  --accent: #b83f62;
  --accent-dark: #832942;
  --line: #ead7dc;
  --warning: #fff2c7;
  --shadow: 0 12px 38px rgba(99, 41, 57, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", sans-serif;
  font-size: 17px;
  line-height: 1.8;
}
a { color: var(--accent-dark); text-underline-offset: 3px; }
.hero { background: #f7dfe5; border-bottom: 1px solid var(--line); }
.hero-inner { max-width: 1060px; margin: auto; padding: 64px 28px 54px; display: flex; align-items: center; gap: 30px; }
.app-icon { border-radius: 24px; box-shadow: var(--shadow); flex: 0 0 auto; }
.eyebrow, .tag { color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .13em; margin: 0 0 5px; }
h1 { margin: 0; font-size: clamp(2.2rem, 6vw, 4rem); line-height: 1.07; letter-spacing: -.035em; }
h1 span { font-size: .52em; letter-spacing: -.01em; }
.lead { max-width: 650px; font-size: 1.15rem; margin: 18px 0 4px; }
.meta { color: var(--muted); font-size: .85rem; margin: 4px 0 0; }
.layout { max-width: 1060px; margin: 0 auto; padding: 42px 28px 80px; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 54px; align-items: start; }
.toc { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 5px; padding: 20px; background: var(--surface); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); font-size: .88rem; }
.toc strong { font-size: 1rem; margin-bottom: 5px; }
.toc a { color: var(--muted); text-decoration: none; padding: 4px 0; }
.toc a:hover, .toc a:focus-visible { color: var(--accent); text-decoration: underline; }
main { min-width: 0; }
section { padding: 48px 0; border-bottom: 1px solid var(--line); }
section:first-child { padding-top: 0; }
section:last-child { border-bottom: 0; }
h2 { margin: 0 0 18px; font-size: clamp(1.65rem, 4vw, 2.25rem); line-height: 1.3; letter-spacing: -.025em; }
h3 { margin: 24px 0 6px; line-height: 1.45; }
p { margin: 10px 0; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; padding: 30px; box-shadow: var(--shadow); }
.intro { margin-bottom: 20px; }
.axis-grid, .mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.axis-grid article { background: var(--surface-soft); border-radius: 16px; padding: 20px; }
.axis-grid h3, .mode-grid h3 { margin-top: 8px; }
.number { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: white; font-weight: 800; }
.steps { list-style: none; padding: 0; margin: 22px 0; counter-reset: step; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 44px 1fr; column-gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.steps li::before { content: counter(step); grid-row: 1 / span 2; display: grid; place-items: center; align-self: start; width: 38px; height: 38px; border-radius: 12px; background: var(--accent); color: white; font-weight: 800; }
.steps span { color: var(--muted); }
.check-list { padding-left: 0; list-style: none; }
.check-list li { position: relative; padding: 8px 0 8px 32px; }
.check-list li::before { content: "✓"; position: absolute; left: 4px; color: var(--accent); font-weight: 900; }
.note, .callout, .warning { margin: 22px 0; padding: 17px 19px; border-radius: 14px; }
.note, .callout { background: var(--surface-soft); border-left: 5px solid var(--accent); }
.warning { background: var(--warning); color: #503d08; border-left: 5px solid #d49a00; }
.mode-grid .card { padding: 22px; box-shadow: none; }
details { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; margin: 12px 0; padding: 0 18px; }
summary { cursor: pointer; font-weight: 700; padding: 16px 0; }
details p { color: var(--muted); margin: 0 0 18px; }
footer { border-top: 1px solid var(--line); background: var(--surface); display: flex; justify-content: center; align-items: center; gap: 14px; padding: 30px; color: var(--muted); font-size: .88rem; }
footer img { border-radius: 11px; }

@media (max-width: 760px) {
  body { font-size: 16px; }
  .hero-inner { align-items: flex-start; padding: 38px 20px 34px; gap: 18px; }
  .app-icon { width: 76px; height: 76px; border-radius: 17px; }
  .layout { display: block; padding: 22px 20px 60px; }
  .toc { position: static; margin-bottom: 24px; }
  .axis-grid, .mode-grid { grid-template-columns: 1fr; }
  .card { padding: 23px; }
  section { padding: 38px 0; }
}

@media (prefers-color-scheme: dark) {
  :root { --bg: #1d1518; --surface: #2a1d21; --surface-soft: #382329; --ink: #f8e9ed; --muted: #d0b7be; --accent: #f08aa5; --accent-dark: #f3a1b7; --line: #4c343b; --warning: #423716; --shadow: none; }
  .hero { background: #3a2028; }
  .warning { color: #f6e6ad; }
}

@media print {
  .toc { display: none; }
  .layout { display: block; max-width: 800px; padding-top: 20px; }
  .hero-inner { max-width: 800px; padding: 30px 0; }
  section { break-inside: avoid; }
  .card { box-shadow: none; }
}