:root {
  color-scheme: dark;
  font-family: "Yu Gothic UI", "Noto Sans JP", "Segoe UI", sans-serif;
  background: #081117;
  color: #f5f7f8;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --surface: #101b23;
  --surface-raised: #15232d;
  --border: #2a3a45;
  --border-strong: #3a4e5b;
  --text: #f5f7f8;
  --muted: #adbac2;
  --accent: #35d466;
  --accent-soft: rgb(53 212 102 / 11%);
  --warning: #f2bd2b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; min-width: 320px; background: #081117; color: var(--text); }
a { color: inherit; }
a:focus-visible { outline: 3px solid var(--warning); outline-offset: 4px; }
.guide-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 72px; padding: 0 max(22px, calc((100% - 1080px) / 2)); border-bottom: 1px solid var(--border); background: rgb(8 17 23 / 94%); }
.guide-brand { font-weight: 800; text-decoration: none; letter-spacing: -.02em; }
.guide-nav { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--muted); font-size: .85rem; }
.guide-nav a { text-underline-offset: 4px; }
.guide-main { width: min(100% - 40px, 860px); margin: 0 auto; padding: 66px 0 88px; }
.guide-eyebrow { color: var(--accent); font-size: .75rem; font-weight: 800; letter-spacing: .13em; }
.guide-main h1 { max-width: 820px; margin: 15px 0 18px; font-size: clamp(2.1rem, 6vw, 3.65rem); line-height: 1.24; letter-spacing: -.045em; text-wrap: balance; }
.guide-lead { margin: 0; color: var(--muted); font-size: 1.08rem; line-height: 1.9; }
.guide-updated { margin: 18px 0 0; color: #80919b; font-size: .8rem; }
.guide-toc { margin: 34px 0 50px; padding: 22px 25px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface); }
.guide-toc strong { display: block; margin-bottom: 12px; }
.guide-toc ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 24px; margin: 0; padding-left: 22px; color: var(--muted); }
.guide-toc a { text-decoration-color: var(--border-strong); text-underline-offset: 3px; }
.guide-content { font-size: 1rem; line-height: 1.9; }
.guide-content h2 { margin: 54px 0 15px; padding-bottom: 10px; border-bottom: 1px solid var(--border); font-size: clamp(1.45rem, 4vw, 1.9rem); line-height: 1.4; letter-spacing: -.025em; }
.guide-content h3 { margin: 30px 0 8px; font-size: 1.12rem; }
.guide-content p { margin: 12px 0; color: var(--muted); }
.guide-content strong { color: var(--text); }
.guide-content ul, .guide-content ol { display: grid; gap: 8px; margin: 14px 0; padding-left: 1.45em; color: var(--muted); }
.guide-content li { padding-left: 3px; }
.guide-content a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.guide-callout { margin: 24px 0; padding: 17px 20px; border-left: 3px solid var(--accent); background: var(--accent-soft); }
.guide-callout p { margin: 0; }
.guide-callout.warning { border-color: var(--warning); background: rgb(242 189 43 / 9%); }
.guide-steps { counter-reset: guide-step; list-style: none; padding: 0 !important; }
.guide-steps li { position: relative; min-height: 54px; padding-left: 54px; }
.guide-steps li::before { counter-increment: guide-step; content: counter(guide-step, decimal-leading-zero); position: absolute; top: 0; left: 0; display: grid; width: 38px; height: 38px; place-items: center; border: 1px solid var(--border-strong); border-radius: 50%; color: var(--accent); font-size: .73rem; font-weight: 800; }
.guide-table-wrap { overflow-x: auto; margin: 20px 0; border: 1px solid var(--border); border-radius: 9px; }
.guide-table { width: 100%; border-collapse: collapse; min-width: 480px; }
.guide-table th, .guide-table td { padding: 13px 15px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.guide-table th { background: var(--surface-raised); color: var(--text); font-size: .86rem; }
.guide-table td { color: var(--muted); font-size: .9rem; }
.guide-table tr:last-child td { border-bottom: 0; }
.guide-cta { margin-top: 58px; padding: 28px; border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border)); border-radius: 12px; background: var(--surface); }
.guide-cta h2 { margin: 0; font-size: 1.4rem; }
.guide-cta p { color: var(--muted); line-height: 1.8; }
.guide-button { display: inline-flex; min-height: 45px; align-items: center; padding: 0 17px; border-radius: 7px; background: var(--accent); color: #041008; font-size: .9rem; font-weight: 800; text-decoration: none; }
.guide-related { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 22px; color: var(--muted); font-size: .9rem; }
.guide-footer { padding: 24px 20px; border-top: 1px solid var(--border); color: #80919b; font-size: .78rem; text-align: center; }
@media (max-width: 620px) {
  .guide-header { align-items: flex-start; flex-direction: column; justify-content: center; min-height: 82px; padding: 14px 20px; }
  .guide-nav { gap: 8px 17px; font-size: .8rem; }
  .guide-main { width: min(100% - 32px, 860px); padding-top: 47px; }
  .guide-toc { padding: 18px; }
  .guide-toc ol { grid-template-columns: 1fr; }
  .guide-content { font-size: .96rem; }
  .guide-cta { padding: 22px; }
  .guide-button { width: 100%; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }