:root {
  color-scheme: light;
  --ink: #1b2559;
  --body: #343d55;
  --muted: #606b7e;
  --orange: #c34427;
  --line: #e1e5eb;
  --teal: #087a77;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: #fff8f0; color: var(--body); font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: #175d89; text-underline-offset: 4px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 3px solid #087a77; outline-offset: 5px; border-radius: 3px; }
.skip-link { position: absolute; left: 12px; top: -100px; padding: 10px 18px; z-index: 5; background: #fff; }
.skip-link:focus { top: 12px; }
.site-header { max-width: 1080px; margin: auto; padding: 24px 28px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { color: var(--ink); display: inline-flex; gap: 9px; align-items: center; text-decoration: none; font-size: 21px; font-weight: 800; letter-spacing: .04em; }
.brand img { width: 32px; height: 32px; }
.site-header__label { color: var(--muted); font-size: 12px; }
.article-shell { max-width: 968px; background: #fff; border: 1px solid #eee9e2; border-radius: 22px; margin: 8px auto 48px; padding: 52px 68px 48px; box-shadow: 0 12px 50px #1b255906; }
.article-head { margin: 0 0 34px; }
.kicker { display: inline-block; margin: 0 0 16px; padding: 5px 12px; border-radius: 6px; background: #eaf6f5; color: #086c69; font-size: 12px; font-weight: 800; letter-spacing: .07em; }
h1 { color: var(--ink); font-size: clamp(27px, 3.6vw, 39px); line-height: 1.6; letter-spacing: .015em; margin: 0 0 22px; font-feature-settings: "palt"; }
h1 span { display: block; font-size: .69em; line-height: 1.75; margin-top: 7px; font-weight: 600; }
.mobile-break { display: none; }
.article-meta { display: flex; flex-wrap: wrap; gap: 7px 18px; color: var(--muted); font-size: 12px; }
.article-meta span + span:before { content: "·"; margin-right: 18px; }
.article-body { max-width: 760px; margin: auto; font-size: 16px; line-height: 2; overflow-wrap: anywhere; }
.article-body p { margin: 0 0 20px; }
.article-body strong { color: var(--ink); font-weight: 700; }
.article-body h2 { color: var(--ink); font-size: clamp(22px, 2.3vw, 28px); line-height: 1.65; margin: 68px 0 26px; padding: 0 0 19px; border-bottom: 3px solid #e0efed; }
.article-body h3 { color: var(--ink); font-size: 19px; line-height: 1.75; margin: 34px 0 16px; }
.article-body ul, .article-body ol { padding-left: 1.6em; margin: 16px 0 24px; }
.article-body li { padding-left: 4px; margin-bottom: 8px; }
.disclosure { font-size: 12px; color: var(--muted); display: flex; align-items: center; gap: 9px; margin: 0 0 26px; }
.disclosure > span { border: 1px solid #c8cdd5; font-size: 11px; line-height: 1.5; border-radius: 4px; padding: 1px 6px; }
.opening-voice { background: #faf7f2; border-left: 3px solid #edb78b; padding: 19px 22px; margin: 0 0 25px; border-radius: 0 12px 12px 0; }
.opening-voice p { margin: 0; font-weight: 600; color: var(--ink); }
.opening-voice p + p { margin-top: 6px; }
.quick-answer { margin: 32px 0; padding: 24px 28px; background: #f0f8f7; border: 1px solid #cee6e1; border-radius: 14px; }
.quick-answer .eyebrow { font-size: 14px; font-weight: 700; margin-bottom: 10px; color: #08716d; }
.quick-answer dl { margin: 0; }
.quick-answer dl > div { display: grid; grid-template-columns: 124px 1fr; gap: 14px; padding: 14px 0; border-bottom: 1px solid #d8e7e3; line-height: 1.85; }
.quick-answer dl > div:last-child { border: 0; }
.quick-answer dt { font-size: 13px; font-weight: 600; }
.quick-answer dd { margin: 0; font-size: 15px; }
.article-body .small-note { font-size: 12px; line-height: 1.85; color: var(--muted); }
.quick-answer .small-note { margin: 10px 0 0; }
.article-toc { margin: 32px 0 42px; border: 1px solid var(--line); border-radius: 12px; padding: 22px 28px; font-size: 14px; }
.article-toc p { margin-bottom: 12px; font-weight: 700; color: var(--ink); }
.article-toc ol { columns: 2; column-gap: 32px; margin: 0; padding-left: 1.6em; }
.article-toc li { break-inside: avoid; margin: 0 0 5px; }
.article-toc a { text-decoration-color: #b8ccd9; }
.screenshot { margin: 28px auto 30px; width: 100%; }
.screenshot--compact { max-width: 336px; }
.screenshot--wide { max-width: 412px; }
.figure-instruction { color: var(--ink); line-height: 1.75; font-weight: 600; font-size: 13px; border: 1px solid #b8d9d3; border-bottom: 0; padding: 13px 15px; border-radius: 10px 10px 0 0; background: #ecf7f4; }
.figure-instruction > span:first-child { display: block; font-size: 11px; color: #116f69; letter-spacing: .04em; margin-bottom: 3px; }
.shot-frame { position: relative; border: 1px solid #d9dfe5; padding: 0; background: #f8f9fa; overflow: hidden; }
.shot-frame img { display: block; width: 100%; height: auto; }
.shot-marker { display: block; position: absolute; z-index: 1; pointer-events: none; border: 3px solid #cc4629; border-radius: 9px; box-shadow: 0 0 0 2px #ffffffc9; }
.marker-filters { left: 3.4%; width: 95%; top: 13.1%; height: 5.7%; }
.marker-before { left: 40.7%; width: 52.1%; top: 87%; height: 7.5%; border-radius: 30px; }
.marker-after { left: 39.6%; width: 53%; top: 82.6%; height: 9.6%; border-radius: 30px; }
.marker-register { left: 3.6%; width: 93%; top: 88.9%; height: 7.1%; border-radius: 30px; }
.marker-google { left: 3.5%; width: 92.9%; top: 20.3%; height: 6.9%; }
.marker-complete { left: 23.9%; width: 52.1%; top: 3%; height: 3.1%; border-radius: 4px; border-width: 2px; }
figcaption { margin-top: 10px; color: var(--muted); font-size: 12px; line-height: 1.85; }
.comparison { display: grid; grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1fr); gap: 14px; align-items: end; margin: 28px 0; }
.comparison .screenshot { margin: 0; }
.comparison .figure-instruction { min-height: 98px; }
.comparison__arrow { color: #b35432; font-size: 25px; align-self: center; text-align: center; }
.note-box { padding: 19px 23px; background: #f6f7fa; border-left: 3px solid #acb6c7; border-radius: 0 10px 10px 0; margin: 24px 0; font-size: 13px; line-height: 1.9; }
.note-box > strong { display: block; margin-bottom: 8px; }
.note-box p { margin-bottom: 0; }
.conversion { margin: 36px 0 44px; padding: 29px 30px 25px; border: 1px solid #f1ccb4; border-top: 4px solid #d56a41; border-radius: 14px; background: #fff7ed; text-align: left; }
.conversion .conversion__pr { font-size: 11px; letter-spacing: .045em; font-weight: 600; color: #865a47; margin-bottom: 10px; }
.conversion h3 { font-size: 22px; margin: 0 0 16px; line-height: 1.65; }
.conversion p { font-size: 15px; margin-bottom: 16px; }
.conversion .conversion__flow { color: #714d3d; font-size: 12px; padding: 12px 0; border-top: 1px solid #f0dbc9; margin: 4px 0 13px; line-height: 1.8; }
.conversion__button { display: block; width: 100%; padding: 18px 22px; background: var(--orange); color: #fff; font-size: 16px; font-weight: 700; line-height: 1.7; border-radius: 9px; text-decoration: none; text-align: center; box-shadow: 0 3px 0 #91351f; transition: background .15s; }
.conversion__button:hover { background: #a73820; text-decoration: none; }
.conversion .conversion__note { font-size: 11px; margin: 13px 0 0; color: #705d51; line-height: 1.8; }
.conversion .conversion__benefits { list-style: none; padding: 0; margin: 20px 0; }
.conversion__benefits li { position: relative; padding-left: 24px; font-size: 13px; margin: 6px 0; }
.conversion__benefits li::before { content: "✓"; position: absolute; left: 0; color: #087a77; font-weight: 800; }
.table-scroll { overflow-x: auto; margin: 24px 0 18px; border-radius: 8px; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.9; }
caption { text-align: left; color: var(--ink); padding: 12px 17px; font-size: 13px; font-weight: 600; background: #fff; }
th, td { padding: 14px 17px; border-top: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { background: #eef2f6; color: var(--ink); border-top: 0; }
tbody th { width: 27%; background: #f8fafb; font-size: 13px; color: var(--ink); font-weight: 600; }
.step-number { display: inline-flex; justify-content: center; align-items: center; background: #e7f4f1; color: #087a77; width: 29px; height: 29px; margin-right: 8px; border-radius: 50%; font-size: 16px; }
.first-use-list { counter-reset: first; list-style: none; padding: 0 !important; border-top: 1px solid var(--line); }
.first-use-list li { position: relative; padding: 16px 0 16px 46px; border-bottom: 1px solid var(--line); margin: 0; }
.first-use-list li::before { counter-increment: first; content: counter(first); position: absolute; left: 0; top: 19px; width: 28px; height: 28px; line-height: 28px; border: 1px solid #a3c5bf; border-radius: 50%; color: #087a77; text-align: center; font-size: 13px; }
.bonus-note { background: #faf9f7; border: 1px solid #ebe7e0; border-radius: 10px; padding: 22px 26px; font-size: 13px; margin: 32px 0; }
.bonus-note h3 { font-size: 16px; margin: 0 0 12px; }
.bonus-note p:last-child { margin-bottom: 0; }
.faq { border-bottom: 1px solid var(--line); padding: 0; }
.faq:first-of-type { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; position: relative; list-style: none; padding: 20px 34px 20px 32px; color: var(--ink); font-size: 15px; font-weight: 600; line-height: 1.8; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; position: absolute; left: 3px; color: #087a77; }
.faq summary::after { content: "+"; position: absolute; right: 8px; color: #69768a; font-size: 21px; top: 15px; font-weight: 400; }
.faq[open] summary::after { content: "−"; }
.faq p { padding: 0 30px 19px 32px; font-size: 14px; margin: 0; }
.conversion--last { margin-top: 48px; }
.article-sources { border-top: 1px solid var(--line); margin-top: 46px; padding-top: 24px; font-size: 12px; color: var(--muted); }
.article-sources h3 { margin: 0 0 14px; font-size: 15px; }
.article-sources p { margin-bottom: 12px; }
.article-sources ul { padding-left: 1.5em; }
.site-footer { text-align: center; padding: 0 20px 32px; color: var(--muted); font-size: 12px; }
.site-footer__links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 22px; margin-top: 12px; font-size: 11px; }
@media (max-width: 780px) {
  .site-header { padding: 18px 20px; }
  .article-shell { margin: 0 12px 30px; padding: 30px 24px; border-radius: 16px; }
  .article-body { font-size: 15px; }
  .article-toc ol { columns: 1; }
  .comparison { gap: 10px; grid-template-columns: minmax(0, 1fr) 20px minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .site-header__label { font-size: 10px; }
  .brand { font-size: 19px; }
  .article-shell { margin: 0 0 24px; border-radius: 0; padding: 28px 22px 32px; border-left: 0; border-right: 0; }
  h1 { font-size: 27px; line-height: 1.55; }
  .mobile-break { display: block; }
  h1 span { font-size: 18px; line-height: 1.8; margin-top: 12px; }
  .article-head { margin-bottom: 26px; }
  .article-meta { font-size: 11px; gap: 4px 12px; }
  .article-meta span + span:before { margin-right: 12px; }
  .opening-voice { padding: 16px 17px; font-size: 14px; }
  .quick-answer { padding: 20px 18px; }
  .quick-answer dl > div { grid-template-columns: 1fr; gap: 3px; padding: 11px 0; }
  .quick-answer dt { font-size: 11px; color: #247e74; }
  .quick-answer dd { font-size: 14px; }
  .article-toc { padding: 20px 22px; }
  .article-body h2 { margin-top: 51px; font-size: 23px; }
  .article-body h3 { font-size: 18px; }
  .screenshot--compact { max-width: 300px; }
  .screenshot--wide { max-width: 340px; }
  .comparison { display: flex; flex-direction: column; align-items: center; gap: 18px; }
  .comparison .screenshot { max-width: 316px; }
  .comparison .figure-instruction { min-height: 0; }
  .comparison__arrow { transform: rotate(90deg); line-height: 1; }
  .note-box { padding: 17px 18px; }
  .conversion { padding: 23px 20px; }
  .conversion h3 { font-size: 20px; }
  .conversion p { font-size: 14px; }
  .conversion__button { font-size: 15px; padding: 16px; }
  th, td { padding: 12px 13px; }
  table { font-size: 13px; }
  tbody th { min-width: 83px; width: 29%; font-size: 12px; }
  .bonus-note { padding: 20px; }
  .bonus-note h3 { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  body { background: #fff; }
  .site-header, .site-footer, .article-toc { display: none; }
  .article-shell { padding: 0; border: 0; box-shadow: none; margin: 0; max-width: none; }
  .article-body { font-size: 10pt; max-width: none; }
  h2, h3 { break-after: avoid; }
  .screenshot, .conversion, .quick-answer { break-inside: avoid; }
  .screenshot--compact { max-width: 180px; }
  .screenshot--wide { max-width: 230px; }
  .faq p { display: block; }
}