/* Theme A — white + pink, rounded cards, sidebar TOC (oopbuy.com inspired) */
:root {
  --bg: #ffffff;
  --soft: #fff3f6;
  --soft-2: #ffe6ee;
  --line: #f3dce4;
  --text: #2a2230;
  --muted: #7a6c78;
  --pink: #ff2d6f;
  --pink-2: #ff5c9a;
  --pink-dark: #d81b56;
  --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.75 "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--pink-dark); }
a:hover { color: var(--pink); }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; color: #1f1724; }
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.container.narrow { max-width: 860px; }

.topbar { background: linear-gradient(90deg, var(--pink), var(--pink-2)); color: #fff; text-align: center; font-size: 14px; padding: 7px 16px; }
.topbar a { color: #fff; font-weight: 700; }

.site-header { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 30; }
.nav { display: flex; align-items: center; gap: 22px; height: 64px; }
.logo { font-weight: 900; font-size: 24px; font-style: italic; color: var(--pink); text-decoration: none; letter-spacing: -.5px; white-space: nowrap; }
.logo:hover { color: var(--pink); }
.logo small { font-size: 13px; font-style: normal; font-weight: 700; color: var(--muted); margin-left: 2px; }
.nav-links { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav-links a { display: block; padding: 6px 12px; border-radius: 999px; color: var(--text); text-decoration: none; font-size: 15px; font-weight: 600; }
.nav-links a:hover { background: var(--soft); color: var(--pink-dark); }
.nav-links a.active { background: var(--soft-2); color: var(--pink-dark); }
.nav-cta { margin-left: auto; }
.menu-toggle { display: none; margin-left: auto; background: none; border: 0; font-size: 26px; color: var(--pink); cursor: pointer; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: linear-gradient(90deg, var(--pink), var(--pink-2)); color: #fff; font-weight: 700; font-size: 16px; padding: 11px 24px; border-radius: 999px; text-decoration: none; border: 0; box-shadow: 0 6px 16px rgba(255, 45, 111, .28); white-space: nowrap; }
.btn:hover { color: #fff; filter: brightness(1.05); transform: translateY(-1px); }
.btn-sm { font-size: 14px; padding: 8px 18px; box-shadow: none; }
.btn-lg { font-size: 17px; padding: 14px 30px; }
.btn-ghost { background: #fff; color: var(--pink-dark); border: 2px solid var(--pink); box-shadow: none; }
.btn-ghost:hover { color: var(--pink-dark); background: var(--soft); }

.hero { background: radial-gradient(circle at 85% 20%, #ffd3e2, transparent 45%), linear-gradient(180deg, var(--soft), #fff); padding: 64px 0 48px; border-bottom: 1px solid var(--line); }
.hero-inner { max-width: 880px; }
.kicker { display: inline-block; background: #fff; border: 1px solid var(--line); color: var(--pink-dark); font-size: 13px; font-weight: 700; padding: 4px 14px; border-radius: 999px; margin-bottom: 16px; }
.hero h1 { font-size: 46px; font-weight: 900; letter-spacing: -1px; }
.hero h1 span { color: var(--pink); }
.lead { font-size: 19px; color: #4d4250; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 20px; }
.points { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; padding: 0; margin: 0; font-size: 15px; font-weight: 600; color: #4d4250; }
.points li::before { content: "● "; color: var(--pink); font-size: 11px; vertical-align: 2px; }

.section-title { font-size: 28px; text-align: center; margin-bottom: 26px; }
.guides { padding: 52px 0 20px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 18px; }
.card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; text-decoration: none; color: var(--text); transition: box-shadow .15s, transform .15s; }
.card:hover { color: var(--text); box-shadow: 0 10px 26px rgba(216, 27, 86, .12); transform: translateY(-2px); }
.card .tag { align-self: flex-start; background: var(--soft-2); color: var(--pink-dark); font-size: 12px; font-weight: 700; padding: 2px 10px; border-radius: 999px; margin-bottom: 10px; }
.card h3 { font-size: 18px; margin-bottom: 6px; }
.card p { font-size: 15px; color: var(--muted); margin: 0 0 10px; line-height: 1.6; }
.card .more { margin-top: auto; color: var(--pink-dark); font-weight: 700; font-size: 14px; }

.page-head { background: linear-gradient(180deg, var(--soft), #fff); border-bottom: 1px solid var(--line); padding: 38px 0 30px; }
.page-head h1 { font-size: 38px; font-weight: 900; letter-spacing: -.5px; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.crumbs a { color: var(--muted); }
.meta { font-size: 14px; color: var(--muted); }

.article-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 48px; padding-top: 40px; padding-bottom: 50px; }
.prose { min-width: 0; }
.prose h2 { font-size: 27px; margin-top: 1.7em; scroll-margin-top: 80px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 20px; margin-top: 1.4em; }
.prose p, .prose li { color: #3a3040; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: .45em; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 15px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--soft); color: var(--pink-dark); }
.prose blockquote { margin: 1.4em 0; padding: 14px 20px; background: var(--soft); border-left: 4px solid var(--pink); border-radius: 0 12px 12px 0; color: #4d4250; }
.note { background: #fffbea; border: 1px solid #f8e7a6; border-radius: 12px; padding: 14px 18px; font-size: 15px; }

.cta-box { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin: 2.2em 0; padding: 22px 26px; border-radius: var(--radius); background: linear-gradient(120deg, #ffe3ec, #fff3f6); border: 1px solid #ffc6d8; }
.cta-box strong { font-size: 19px; color: #1f1724; }
.cta-box p { margin: 4px 0 0; font-size: 15px; color: #5d5060; }

.sidebar { position: relative; }
.toc, .side-cta { position: sticky; top: 88px; }
.toc { background: var(--soft); border-radius: var(--radius); padding: 18px 20px; font-size: 14px; margin-bottom: 18px; }
.toc h4 { font-size: 13px; text-transform: uppercase; letter-spacing: .6px; color: var(--pink-dark); }
.toc ol { margin: 0; padding-left: 1.2em; }
.toc li { margin-bottom: 6px; }
.toc a { color: #4d4250; text-decoration: none; }
.toc a:hover { color: var(--pink-dark); }
.side-cta { top: auto; position: static; background: #fff; border: 2px solid var(--soft-2); border-radius: var(--radius); padding: 20px; text-align: center; }
.side-cta p { font-size: 14px; color: var(--muted); margin: 6px 0 14px; }

.faq details { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 10px; background: #fff; }
.faq summary { cursor: pointer; list-style: none; padding: 14px 18px; font-weight: 700; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--pink); font-weight: 900; }
.faq details[open] summary::after { content: "–"; }
.faq details > div { padding: 0 18px 14px; color: #4d4250; }

.related { background: var(--soft); padding: 44px 0; }
.related h2 { font-size: 24px; margin-bottom: 20px; }

.site-footer { background: #1f1724; color: #c9bcc6; padding: 46px 0 22px; font-size: 14px; }
.site-footer .logo { color: var(--pink-2); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 28px; }
.site-footer h4 { color: #fff; font-size: 15px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: #c9bcc6; text-decoration: none; }
.site-footer a:hover { color: var(--pink-2); }
.disclaimer-mini { font-size: 12px; border-top: 1px solid #3a2f3d; margin-top: 28px; padding-top: 16px; color: #9a8c98; }
.copyright { font-size: 12px; color: #9a8c98; text-align: center; margin-top: 10px; }

@media (max-width: 960px) {
  .article-wrap { grid-template-columns: 1fr; gap: 10px; }
  .toc { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .menu-toggle { display: block; }
  .nav-cta { display: none; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: #fff; padding: 10px 16px 16px; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px rgba(0,0,0,.06); }
  .nav-links.open { display: flex; }
  .hero { padding: 40px 0 34px; }
  .hero h1 { font-size: 32px; }
  .page-head h1 { font-size: 29px; }
  .lead { font-size: 17px; }
  .cta-box { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn-lg { width: 100%; }
}