/* cloudflare-ready CSS | fully local system fonts | distinct site-specific compositions */
:root{--accent:#1478a8;--bg:#fafafa;--ink:#1b2527;--muted:#68747b;--line:#dce2e0;--surface:#fff;--soft:#f0f4f3;--radius:18px;--max:1180px;--serif:Georgia,"Noto Serif CJK KR",serif;--sans:system-ui,-apple-system,"Apple SD Gothic Neo","Noto Sans KR",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:var(--sans);background:var(--bg);line-height:1.7;word-break:keep-all;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:hover{text-decoration-color:var(--accent)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}img,svg{max-width:100%}button,input,select{font:inherit}button{cursor:pointer}.wrap{max-width:var(--max);margin:auto;padding:0 28px}.skip{position:absolute;z-index:99;top:-100px;left:24px;background:#fff;color:#111;padding:10px}.skip:focus{top:8px}.site-header{position:relative;z-index:10;border-bottom:1px solid var(--line);background:var(--bg)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:80px}.wordmark{display:inline-flex;gap:12px;align-items:center;line-height:1.15;white-space:nowrap}.wordmark-icon{background:var(--accent);color:var(--bg);display:inline-grid;place-items:center;width:42px;height:42px;font-size:27px;border-radius:12px;font-weight:800}.wordmark-main{display:block;letter-spacing:-.03em;font-size:19px;font-weight:850}.wordmark-sub{display:block;font-size:10px;letter-spacing:.12em;color:var(--muted);margin-top:3px}.top-nav{display:flex;gap:25px;align-items:center}.top-nav a{font-size:14px;font-weight:750;color:var(--muted)}.top-nav a:hover,.top-nav a[aria-current=page]{color:var(--accent);text-decoration:none}.header-cta,.btn-primary,.btn-secondary{border-radius:999px;display:inline-flex;justify-content:center;align-items:center;padding:12px 22px;font-size:14px;font-weight:800;line-height:1.4;transition:transform .15s ease,opacity .15s ease}.header-cta,.btn-primary{background:var(--accent);color:var(--bg)}.btn-secondary{border:1px solid var(--line);background:var(--surface)}.header-cta:hover,.btn-primary:hover,.btn-secondary:hover{transform:translateY(-2px);text-decoration:none}.mobile-menu{display:none}.mobile-menu summary{cursor:pointer;font-weight:800}.mobile-menu nav{display:flex;flex-direction:column;gap:14px;padding:18px 0}.eyebrow{font-size:12px;font-weight:850;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}.hero{padding:78px 0 60px}.hero-grid{display:grid;grid-template-columns:1.07fr .93fr;align-items:center;gap:55px}.hero-text h1{font-size:clamp(42px,5.4vw,76px);letter-spacing:-.07em;line-height:1.13;margin:18px 0 23px;font-weight:850}.hero-text h1 em{font-style:normal;color:var(--accent)}.hero-text p{max-width:600px;color:var(--muted);font-size:18px;line-height:1.9;margin-bottom:28px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.hero-visual{position:relative}.hero-visual img{display:block;box-shadow:0 20px 80px #00000012;border-radius:26px}.hero-visual::after{content:'';position:absolute;left:-25px;bottom:-26px;width:120px;height:105px;background:var(--accent);opacity:.10;border-radius:30px;z-index:-1}.hero-stat{display:flex;flex-wrap:wrap;gap:16px;margin-top:24px}.hero-stat b{font-size:13px;font-weight:750;color:var(--muted)}.section{padding:62px 0}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}.section-head h2{font-size:clamp(27px,3vw,42px);letter-spacing:-.055em;line-height:1.3;margin:6px 0 8px}.section-head p{color:var(--muted);max-width:690px;margin:0}.arrow-link{color:var(--accent);font-weight:850;font-size:14px;white-space:nowrap}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.guide-card{display:flex;flex-direction:column;padding:26px;border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);min-height:228px;transition:transform .2s,border-color .2s,box-shadow .2s}.guide-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 16px 40px #00000010;text-decoration:none}.card-meta{color:var(--accent);font-size:12px;font-weight:850;letter-spacing:.06em}.guide-card h3{font-size:21px;line-height:1.45;letter-spacing:-.04em;margin:14px 0 9px}.guide-card p{color:var(--muted);font-size:14px;margin:0 0 16px;line-height:1.7;flex:1}.card-end{display:block;font-size:13px;font-weight:750;color:var(--accent)}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.tool-card{display:block;background:var(--soft);padding:24px;border-radius:var(--radius);border:1px solid var(--line);transition:transform .18s,border-color .18s}.tool-card:hover{transform:translateY(-3px);border-color:var(--accent);text-decoration:none}.tool-icon{display:grid;place-items:center;border-radius:13px;width:48px;height:48px;background:var(--accent);color:var(--bg);font-size:24px;font-weight:900;margin-bottom:18px}.tool-card h3{font-size:20px;margin:0 0 7px;letter-spacing:-.035em}.tool-card p{font-size:14px;line-height:1.7;color:var(--muted);margin:0}.note-band{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0}.note-band .wrap{display:flex;gap:24px;align-items:center;justify-content:space-between}.note-band p{margin:0;font-size:14px;color:var(--muted)}.note-band b{white-space:nowrap;font-size:15px}.site-footer{margin-top:70px;background:var(--soft);border-top:1px solid var(--line);padding:52px 0 32px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px}.footer-grid h4{margin:0 0 13px;font-size:16px}.footer-grid p{font-size:13px;color:var(--muted);max-width:330px}.footer-links{display:flex;flex-direction:column;gap:9px}.footer-links a{font-size:13px;color:var(--muted)}.footer-links a:hover{color:var(--accent)}.footer-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:20px;font-size:12px;color:var(--muted)}.page-top{padding:58px 0 28px}.page-top h1{font-size:clamp(38px,5vw,59px);line-height:1.23;letter-spacing:-.06em;margin:10px 0}.page-top p{font-size:16px;color:var(--muted);max-width:720px}.breadcrumb{display:flex;gap:10px;font-size:12px;color:var(--muted);flex-wrap:wrap;align-items:center;margin-bottom:15px}.breadcrumb a{text-decoration:underline;text-decoration-color:transparent}.breadcrumb a:hover{text-decoration-color:currentColor}.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:64px;align-items:start}.article-main{font-size:17px;line-height:1.95}.article-main p{margin:0 0 22px}.article-main h2{font-size:29px;line-height:1.35;margin:46px 0 16px;letter-spacing:-.05em;scroll-margin-top:30px}.article-main h3{font-size:21px;margin:32px 0 14px}.article-lead{font-size:20px;color:var(--ink);font-weight:620;margin:16px 0 28px!important}.article-meta{font-size:12px;color:var(--muted);margin-bottom:20px}.article-aside{position:sticky;top:24px;padding:22px;background:var(--soft);border:1px solid var(--line);border-radius:var(--radius)}.article-aside h3{margin:0 0 12px;font-size:15px}.article-aside a{display:block;font-size:13px;line-height:1.55;padding:9px 0;border-top:1px solid var(--line)}.article-aside a:hover{color:var(--accent)}.check-panel{border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:15px;padding:24px 28px;background:var(--soft);margin:32px 0}.check-panel h2{font-size:24px;margin:0 0 14px}.check-panel ul{margin:0;padding-left:22px}.check-panel li{padding:4px 0}.faq-panel{padding:20px 24px;border-radius:16px;border:1px solid var(--line);margin:26px 0}.faq-panel summary{cursor:pointer;font-weight:800}.faq-panel p{padding-top:15px;margin-bottom:0}.source-note{margin:22px 0;padding:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.source-note a{color:var(--accent);text-decoration:underline}.related{margin-top:44px}.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.related a{padding:18px;border:1px solid var(--line);border-radius:14px;font-weight:700;font-size:15px;background:var(--surface)}.related a:hover{border-color:var(--accent);color:var(--accent)}.directory-controls{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:26px}.directory-controls label{font-size:13px;font-weight:800}.directory-controls input,.directory-controls select{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:12px;padding:13px 14px}.directory-controls input{min-width:min(400px,100%);flex:1}.filter-status{font-size:13px;color:var(--muted)}.guide-card[hidden]{display:none!important}.legal-text{max-width:880px;font-size:16px;line-height:1.95}.legal-text h2{font-size:25px;letter-spacing:-.04em;margin-top:35px}.legal-text li{padding:5px 0}.legal-text a{color:var(--accent);text-decoration:underline}.tool-shell{display:grid;grid-template-columns:1fr .88fr;gap:24px;align-items:start;margin:26px 0 42px}.tool-panel,.tool-results{padding:28px;border:1px solid var(--line);background:var(--surface);border-radius:22px;box-shadow:0 9px 35px #00000007}.tool-panel h2,.tool-results h2{font-size:22px;letter-spacing:-.04em;margin:0 0 20px}.tool-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tool-field{display:flex;flex-direction:column;gap:6px}.tool-field label{font-size:13px;font-weight:750}.input-wrap{position:relative}.input-wrap input{width:100%;padding:13px 53px 13px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);font-variant-numeric:tabular-nums}.input-wrap span{font-size:11px;color:var(--muted);position:absolute;right:12px;top:50%;transform:translateY(-50%)}.tool-actions{margin-top:23px;display:flex;gap:12px;align-items:center}.tool-error{color:#d4513d;font-size:13px;margin-top:8px;min-height:22px}.tool-results{background:var(--soft);min-height:260px}.tool-results .hint{font-size:14px;color:var(--muted)}.result-line{display:flex;gap:12px;justify-content:space-between;border-bottom:1px solid var(--line);padding:17px 0;font-size:14px}.result-line strong{font-size:20px;font-variant-numeric:tabular-nums;letter-spacing:-.03em;overflow-wrap:anywhere;text-align:right}.result-line.feature strong{color:var(--accent);font-size:26px}.formula-box{background:var(--soft);border-radius:17px;padding:22px;border:1px solid var(--line);margin:16px 0 30px}.formula-box strong{display:block;font-size:16px;margin-bottom:8px}.formula-box p{font-size:14px;margin:0}.tool-tips{font-size:15px;max-width:890px}.tool-tips li{padding:5px 0}.pack-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.pack-list label{display:flex;align-items:flex-start;gap:10px;padding:13px 15px;border-radius:12px;border:1px solid var(--line);cursor:pointer}.pack-list input{margin-top:6px;accent-color:var(--accent)}.pack-list label:has(input:checked){background:var(--soft);border-color:var(--accent)}.pack-progress{font-weight:900;font-size:30px;color:var(--accent);margin-bottom:14px}.unit-input{font:inherit;padding:14px;width:100%;max-width:420px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink)}.empty-result{padding:28px;text-align:center;color:var(--muted)}
/* JAPAN: restrained newspaper/travel magazine, deep red, large serif and ticket-like cards */
.theme-japan{--accent:#bd3e31;--bg:#fff9f0;--ink:#302d28;--muted:#73695e;--line:#e9dccd;--surface:#fffdfa;--soft:#f6ece0;--radius:5px;--max:1160px}.theme-japan .site-header{border-bottom:2px solid #302d28}.theme-japan .wordmark-icon{border-radius:50%;color:#fff}.theme-japan .hero{padding:90px 0 85px}.theme-japan .hero-text h1{font-family:var(--serif);font-weight:700;font-size:clamp(45px,6vw,80px)}.theme-japan .eyebrow{letter-spacing:.28em}.theme-japan .guide-card{border-radius:0;border-bottom:4px solid #cfb19c}.theme-japan .guide-card:nth-child(3n+2){transform:translateY(17px)}.theme-japan .guide-card:nth-child(3n+2):hover{transform:translateY(13px)}.theme-japan .tool-card{border-radius:4px}.theme-japan .page-top h1{font-family:var(--serif);font-weight:700}.theme-japan .hero-visual img{border-radius:3px;box-shadow:15px 16px 0 #e5c3af}.theme-japan .btn-primary,.theme-japan .header-cta,.theme-japan .btn-secondary{border-radius:3px}.theme-japan .article-main h2{font-family:var(--serif)}
/* MONGGOL: cinematic night-sky, warm sand text, tall cards, large quiet spaces */
.theme-monggol{--accent:#e7ac64;--bg:#121e20;--ink:#f7ebd8;--muted:#b9b8aa;--line:#394543;--surface:#1b292a;--soft:#233332;--radius:28px;--max:1200px}.theme-monggol .site-header{background:#162324}.theme-monggol .hero{padding:68px 0 100px;background:radial-gradient(circle at 65% 35%,#243f3d 1%,transparent 58%),#121e20}.theme-monggol .hero-text h1{font-family:var(--serif);font-weight:600;line-height:1.24;font-size:clamp(44px,5.5vw,78px)}.theme-monggol .hero-text h1 em{display:block;color:#f0bb83}.theme-monggol .hero-visual img{border-radius:22px;box-shadow:0 22px 90px #0008}.theme-monggol .guide-card{min-height:290px;justify-content:flex-end;background:linear-gradient(148deg,#293e39,#192827)}.theme-monggol .guide-card h3{font-family:var(--serif);font-size:25px;font-weight:650}.theme-monggol .tool-card{background:linear-gradient(150deg,#2d403c,#1b2929)}.theme-monggol .page-top h1{font-family:var(--serif);font-weight:650}.theme-monggol .btn-primary,.theme-monggol .header-cta{color:#1a1f1e}.theme-monggol .tool-icon{color:#1a1f1e}.theme-monggol .article-main h2{color:#e7b683}.theme-monggol .legal-text a{color:#f0b56e}
/* COIN: dark terminal / precise grid / monospace accents, ticker-like panels */
.theme-coin{--accent:#6ee7c8;--bg:#081b20;--ink:#ecfff8;--muted:#a6c0c0;--line:#28444b;--surface:#10272d;--soft:#12323a;--radius:13px;--max:1200px}.theme-coin .site-header{background:#0b2328}.theme-coin .wordmark-icon{border-radius:7px;color:#062d25;font-family:monospace}.theme-coin .wordmark-main{font-family:monospace;letter-spacing:-.025em}.theme-coin .eyebrow,.theme-coin .card-meta,.theme-coin .hero-stat{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.theme-coin .hero{background:radial-gradient(ellipse at 80% 25%,#13444c99,transparent 56%);padding:72px 0 76px}.theme-coin .hero-text h1{font-size:clamp(43px,5.3vw,72px);font-weight:850}.theme-coin .hero-visual img{border:1px solid #2c6b69;border-radius:14px}.theme-coin .guide-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.theme-coin .guide-card{border-left:3px solid #356c68;box-shadow:inset 0 1px #ffffff10}.theme-coin .guide-card:hover{border-left-color:var(--accent)}.theme-coin .guide-card h3{font-size:19px}.theme-coin .btn-primary,.theme-coin .header-cta{color:#052b2b;border-radius:6px}.theme-coin .tool-icon{color:#063134;border-radius:7px}.theme-coin .article-meta{font-family:monospace}
/* ETH: bright technical documentation, purple modular panels and subtle gradients */
.theme-eth{--accent:#6251db;--bg:#f7f7ff;--ink:#25243e;--muted:#656683;--line:#dfdffa;--surface:#fff;--soft:#efefff;--radius:21px;--max:1160px}.theme-eth .site-header{background:#ffffffee}.theme-eth .hero{background:linear-gradient(140deg,#f6f6ff,#e9edff);padding:83px 0 85px}.theme-eth .hero-text h1{font-size:clamp(43px,5.2vw,73px)}.theme-eth .hero-visual img{border:7px solid #fff;box-shadow:0 30px 80px #5646cb2b}.theme-eth .guide-card{box-shadow:0 10px 25px #3f3f9915}.theme-eth .guide-card h3{font-size:20px}.theme-eth .tool-card{background:#fff;box-shadow:0 8px 28px #7469bb16}.theme-eth .article-aside,.theme-eth .check-panel{box-shadow:0 12px 30px #706cb017}.theme-eth .tool-results{background:linear-gradient(135deg,#efedff,#f8f8ff)}
/* BTC: high-contrast brutalist handbook and orange accent stripes */
.theme-btc{--accent:#e98410;--bg:#fcfaf5;--ink:#1b1c1b;--muted:#5e605a;--line:#d9d5c9;--surface:#fff;--soft:#f2eadc;--radius:8px;--max:1180px}.theme-btc .site-header{border-bottom:3px solid #202020}.theme-btc .hero{padding:76px 0;background:repeating-linear-gradient(90deg,#fcfaf5,#fcfaf5 74px,#f7f2e9 75px,#f7f2e9 76px)}.theme-btc .hero-text h1{font-size:clamp(46px,6.4vw,84px);font-weight:950;letter-spacing:-.09em}.theme-btc .hero-visual img{border-radius:3px;box-shadow:16px 16px 0 #f9bb66}.theme-btc .eyebrow,.theme-btc .wordmark-main{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.theme-btc .guide-card{border-radius:0;border-top:5px solid var(--accent)}.theme-btc .guide-card h3{font-size:22px}.theme-btc .tool-card{border:2px solid #1b1c1b;border-radius:1px}.theme-btc .btn-primary,.theme-btc .header-cta,.theme-btc .btn-secondary{border-radius:2px}.theme-btc .tool-icon{border-radius:0;color:#111}.theme-btc .page-top h1{font-weight:900}
@media(max-width:1000px){.top-nav{gap:13px}.header-cta{display:none}.article-grid{grid-template-columns:minmax(0,1fr) 240px;gap:28px}.hero-grid{gap:28px}.guide-card h3{font-size:19px}.theme-monggol .guide-card h3{font-size:22px}}
@media(max-width:760px){.wrap{padding:0 19px}.header-inner{min-height:68px}.wordmark-main{font-size:16px}.wordmark-icon{width:36px;height:36px;font-size:21px}.top-nav{display:none}.mobile-menu{display:block}.hero{padding:48px 0!important}.hero-grid{grid-template-columns:1fr;gap:35px}.hero-text h1,.theme-japan .hero-text h1,.theme-monggol .hero-text h1{font-size:clamp(38px,9vw,56px)}.hero-text p{font-size:16px}.hero-visual{max-width:560px}.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.theme-coin .guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.theme-japan .guide-card:nth-child(3n+2){transform:none}.theme-japan .guide-card:nth-child(3n+2):hover{transform:translateY(-4px)}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-grid{grid-template-columns:1fr}.article-aside{position:static}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-grid>div:first-child{grid-column:1/-1}.note-band .wrap{display:block}.page-top{padding:35px 0 18px}.article-main h2{font-size:25px}.tool-shell{grid-template-columns:1fr}.section{padding:45px 0}.section-head{align-items:start;flex-direction:column}.tool-fields{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.guide-grid,.theme-coin .guide-grid,.tool-grid{grid-template-columns:1fr}.guide-card{min-height:175px!important}.section-head h2{font-size:28px}.hero-visual img{border-radius:14px}.hero-actions{flex-direction:column}.hero-actions a{text-align:center}.related-grid,.pack-list,.tool-fields{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.article-main{font-size:16px}.article-lead{font-size:18px}.tool-panel,.tool-results{padding:18px}.wordmark-sub{font-size:9px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}