:root{--bg:#FFFBF5;--surface:#FFFFFF;--alt:#F4F0E8;--fg:#2B2B2B;--muted:#6B6B6B;--primary:#1F7A72;--primary-soft:#E8F6F4;--line:#E6E1DA;--warn-bg:#FFF4E0;--warn:#B87400;--info-bg:#E6F2FB;color-scheme:light}
@media (prefers-color-scheme:dark){:root{--bg:#14191A;--surface:#1C2223;--alt:#232A2B;--fg:#ECEAE6;--muted:#A8B0AE;--primary:#5CC4BA;--primary-soft:#1E3633;--line:#2E3637;--warn-bg:#3A2E17;--warn:#F0B54A;--info-bg:#1B2C3A;color-scheme:dark}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Apple SD Gothic Neo","Noto Sans KR","Hiragino Sans","Noto Sans JP","PingFang SC","Noto Sans SC","PingFang TC","Noto Sans TC","Noto Sans Thai",sans-serif;word-break:keep-all;overflow-wrap:anywhere}
:lang(ja) body,:lang(zh-Hans) body,:lang(zh-Hant) body,:lang(th) body{word-break:normal}
a{color:var(--primary)}
.wrap{max-width:760px;margin:0 auto;padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right))}
header.site{border-bottom:1px solid var(--line);background:var(--surface)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:12px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--fg);font-weight:700}
.brand img{width:32px;height:32px;border-radius:8px}
.lang select{font:inherit;font-size:14px;padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--fg)}
main{padding-block:28px 48px}
.hero{width:100%;height:auto;aspect-ratio:5/2;object-fit:cover;border-radius:16px;background:var(--alt);display:block}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 6px}
.badge{font-size:13px;background:var(--primary-soft);color:var(--primary);border-radius:999px;padding:3px 12px;font-weight:600}
h1{font-size:30px;line-height:1.35;margin:6px 0 10px;text-wrap:balance}
.lead{color:var(--muted);margin:0 0 20px}
h2{font-size:22px;line-height:1.4;margin:40px 0 12px;text-wrap:balance;padding-left:12px;border-left:4px solid var(--primary)}
h3{font-size:18px;margin:24px 0 8px}
ul,ol{padding-left:1.3em}li{margin:4px 0}
.glance{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 20px;margin:20px 0}
.glance h2{border:0;padding:0;margin:0 0 8px;font-size:16px;color:var(--primary)}
.glance ul{margin:0}
.callout{border-radius:12px;padding:12px 16px;margin:18px 0}.callout p{margin:0}
.callout.warn{background:var(--warn-bg);border-left:4px solid var(--warn)}
.country{background:var(--info-bg);border-radius:16px;padding:14px 20px;margin:24px 0}
.country h2{border:0;padding:0;margin:0 0 6px;font-size:17px}
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 16px;margin:10px 0}
details.faq summary{font-weight:700;cursor:pointer}details.faq p{margin:8px 0 2px}
.box{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:28px 0}
.box h2{border:0;padding:0;margin:0 0 8px;font-size:18px}
.btns{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.btn{display:inline-block;background:var(--primary);color:#fff;text-decoration:none;font-weight:700;border-radius:12px;padding:10px 16px;font-size:15px}
@media (prefers-color-scheme:dark){.btn{color:#10201E}}
.btn.alt{background:var(--primary-soft);color:var(--primary)}
.sources li,.related li{font-size:15px}
.ad{text-align:center;min-height:0}
.ad-label{display:none;font-size:12px;color:var(--muted);margin:0 0 6px;letter-spacing:.04em}
.ad:has(ins[data-ad-status="filled"]){margin:32px 0}
.ad:has(ins[data-ad-status="filled"]) .ad-label{display:block}
.disclaimer{font-size:14px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:28px}
.stage{margin-top:36px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--fg);display:flex;flex-direction:column;min-width:0}
.card img{width:100%;height:auto;aspect-ratio:5/2;object-fit:cover;display:block;background:var(--alt)}
.card span{padding:10px 12px 12px;font-weight:600;line-height:1.45}
.card small{display:block;color:var(--muted);font-weight:400;font-size:14px;margin-top:4px}
footer.site{border-top:1px solid var(--line);color:var(--muted);font-size:14px}
footer.site .wrap{padding-block:18px;display:flex;gap:16px;flex-wrap:wrap}
.langs{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;padding:0;list-style:none}
.langs a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px;text-decoration:none;font-weight:600}

/* Published ebook purchase cards */
.book-cta{display:flex;align-items:flex-start;gap:24px}.book-cover{width:128px;height:auto;flex:none;box-shadow:0 5px 15px #0002;border-radius:4px}.book-copy{min-width:0}.book-copy p{margin:0 0 12px}.book-edition{font-size:13px;color:var(--muted);font-weight:600}.book-cta .btn{background:var(--primary);color:#fff}@media(prefers-color-scheme:dark){.book-cta .btn{color:#10201E}}@media(max-width:520px){.book-cta{gap:16px;flex-direction:column}.book-cover{width:104px}.book-cta .btn{max-width:100%;box-sizing:border-box}}