:root{--primary:#1e3a8a;--primary-light:#2563eb;--text-main:#0f172a;--text-sub:#334155;--text-muted:#64748b;--bg-main:#f8fafc;--bg-card:#fff;--primary-bg:#eff6ff;--accent-light:#f59e0b;--border-color:#e2e8f0;--control-border:#64748b;--warning-bg:#fffbeb;--warning-text:#92400e;--error-bg:#fef2f2;--error-text:#991b1b;--success-bg:#ecfdf5;--success-text:#065f46;--teal:#0f766e;--purple:#6d28d9;--radius-sm:8px;--radius-md:12px;--radius-lg:18px;--shadow:0 2px 6px rgba(15,23,42,.06)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg-main);color:var(--text-main);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;word-break:keep-all;overflow-wrap:anywhere}button,input,select,textarea{font:inherit}a{color:var(--primary);text-underline-offset:4px}img,svg{max-width:100%}p{margin:0 0 16px}h1,h2,h3{line-height:1.4;letter-spacing:-.035em;overflow-wrap:anywhere}h1{font-size:38px;font-weight:800;margin:12px 0 20px}h2{font-size:25px;font-weight:800;margin:0 0 18px}h3{font-size:20px;margin:0 0 12px}ul,ol{padding-left:24px}li{margin:7px 0}main,.content-width{width:min(100% - 40px,800px);margin-inline:auto}main{padding-block:32px 64px}section,article,nav,div{min-width:0}section[id],h2[id],.result-card{scroll-margin-top:104px}.skip-link{position:absolute;top:-80px;left:16px;z-index:300;background:var(--primary);color:#fff;padding:14px 20px}.skip-link:focus{top:8px}:focus-visible{outline:3px solid var(--primary-light);outline-offset:4px;border-radius:4px}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}button:hover:disabled{transform:none}[hidden]{display:none!important}
.site-header{background:#fff;border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:50}.header-inner{max-width:1100px;margin:auto;min-height:76px;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--primary);white-space:nowrap;font-size:19px;font-weight:800;letter-spacing:-.04em}.brand svg{width:36px;height:40px;flex-shrink:0}.brand small{display:block;font-size:10px;font-weight:600;letter-spacing:.12em;color:var(--text-muted);line-height:1.4}.nav-links{display:flex;gap:4px;align-items:center}.nav-links a{display:block;text-decoration:none;font-size:14px;font-weight:700;padding:10px 12px;border-radius:8px;white-space:nowrap;color:var(--text-sub)}.nav-links a[aria-current=page]{background:var(--primary-bg);color:var(--primary)}.menu-toggle{display:none;border:1px solid var(--border-color);background:#fff;border-radius:8px;color:var(--primary);min-height:44px;min-width:56px;font-weight:700}.header-note{font-size:12px;color:var(--text-muted)}
.breadcrumb{font-size:13px;color:var(--text-muted);margin-bottom:24px}.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}.breadcrumb li{margin:0}.breadcrumb li+li:before{content:'/';margin-right:6px;color:var(--text-muted)}.eyebrow{display:inline-block;letter-spacing:.12em;font-size:12px;font-weight:800;color:var(--primary);text-transform:uppercase}.page-intro{margin-bottom:28px}.page-intro>p{font-size:17px;color:var(--text-sub)}.meta-line{font-size:13px;color:var(--text-muted);display:flex;gap:10px;flex-wrap:wrap}.hero{background:var(--primary);color:#fff;border-radius:22px;padding:38px 34px;position:relative;isolation:isolate}.hero .eyebrow{color:#bfdbfe}.hero h1{max-width:620px;font-size:40px;letter-spacing:-.045em}.hero h1 em{font-style:normal;color:#fcd34d}.hero>p{color:#dbeafe;max-width:650px;font-size:17px}.hero .hero-caption{font-size:12px;color:#bfdbfe;margin-top:22px;margin-bottom:0;letter-spacing:.04em}.hero-marker{width:40px;height:4px;background:var(--accent-light);margin-bottom:22px}.hero-actions{display:flex;flex-direction:column;gap:12px;margin-top:26px}.hero .button--light{background:#fff;color:var(--primary);border-color:#fff}.hero .button--outline-light{color:#fff;border-color:#93c5fd;background:transparent}.hero .button{justify-content:space-between;padding-inline:20px}.hero .button svg{width:20px;height:20px}.section{margin-top:40px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.section-heading h2{margin:0}.section-heading>span{font-size:13px;color:var(--text-muted)}.section-lead{color:var(--text-sub);margin-top:-6px}.stack{display:flex;flex-direction:column;gap:16px}.card,.hub-card,.nexus-card,.procedure-step-card,.calc-form-card,.result-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow)}.hub-card,.nexus-card{display:block;text-decoration:none;color:var(--text-main);border-left:4px solid var(--primary-light);position:relative;padding-right:58px}.hub-card::after,.nexus-card::after{content:'→';position:absolute;right:25px;top:25px;color:var(--primary);font-size:22px}.card-label{display:flex;align-items:center;gap:12px;font-size:12px;font-weight:800;color:var(--primary);letter-spacing:.05em;margin-bottom:10px}.icon-box{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--primary-bg);color:var(--primary);font-size:17px;letter-spacing:0}.icon-box svg{width:23px;height:23px}.hub-card h3,.nexus-card h3{font-size:20px;color:var(--primary);margin:0 0 8px}.hub-card p,.nexus-card p{font-size:15px;color:var(--text-sub);margin:0 0 10px}.link-caption{font-size:13px;font-weight:700;color:var(--primary)}.card--calc{border-left-color:var(--purple)}.card--calc .card-label,.card--calc .link-caption{color:var(--purple)}.card--document{border-left-color:var(--teal)}.card--document .card-label,.card--document .link-caption{color:var(--teal)}.geo-summary-box{background:var(--primary-bg);border-left:4px solid var(--primary-light);border-radius:0 12px 12px 0;padding:24px;margin:28px 0}.geo-summary-box h2{font-size:18px;color:var(--primary);margin-bottom:12px}.geo-summary-box p:last-child{margin-bottom:0}.notice{padding:20px;border-radius:12px;border:1px solid var(--border-color);margin-block:24px}.notice p:last-child{margin-bottom:0}.notice strong{display:block;margin-bottom:6px}.notice--warning{background:var(--warning-bg);color:var(--warning-text);border-color:#fde68a}.notice--error{background:var(--error-bg);color:var(--error-text);border-color:#fecaca}.notice--success{background:var(--success-bg);color:var(--success-text);border-color:#a7f3d0}.notice--info{background:var(--primary-bg);color:var(--primary)}.safety-strip{padding:18px 22px;background:var(--warning-bg);border:1px solid #fde68a;border-radius:12px;color:var(--warning-text);font-size:14px;margin-block:24px}.safety-strip strong{display:block;margin-bottom:4px}.safety-strip a{color:inherit;font-weight:800}.toc{padding:24px;background:#fff;border:1px solid var(--border-color);border-radius:12px;margin:32px 0}.toc h2{font-size:18px;margin-bottom:12px}.toc ol{margin:0}.toc li{margin:0}.toc a{font-size:15px;line-height:1.6;min-height:44px;display:flex;align-items:center;text-decoration:none;padding-block:8px}.prose-section{margin-block:36px}.prose-section>p{color:var(--text-sub)}.prose-section h2{padding-top:4px}.procedure-step-card{margin-block:16px;padding-left:26px}.step-no{font-size:12px;color:var(--primary);font-weight:800;letter-spacing:.1em;margin-bottom:6px;display:block}.procedure-step-card p:last-child{margin-bottom:0;color:var(--text-sub)}.key-table{width:100%;border-collapse:collapse;font-size:15px;line-height:1.7}.key-table caption{text-align:left;font-weight:700;margin-bottom:12px}.key-table th,.key-table td{padding:14px 16px;border-bottom:1px solid var(--border-color);text-align:left;vertical-align:top}.key-table th{background:var(--primary-bg);font-weight:700;color:var(--primary)}.key-table tbody th{width:28%}.table-wrap{overflow-x:auto;border:1px solid var(--border-color);border-radius:12px;background:#fff;margin:20px 0}.routes th:nth-child(2){color:var(--teal);background:#f0fdfa}.routes td{width:50%}.official-link{border:1px solid var(--border-color);border-left:4px solid var(--teal);background:#fff;padding:24px;border-radius:12px;margin-block:16px}.official-link h3{color:var(--primary)}.official-url{display:block;font-size:13px;color:var(--text-muted);margin-bottom:16px}.official-actions{display:flex;flex-direction:column;gap:12px}.button,button.primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 20px;background:var(--primary);color:#fff;border:2px solid var(--primary);border-radius:10px;text-decoration:none;font-weight:800;line-height:1.6;text-align:center}.button--secondary,button.secondary{background:#fff;color:var(--primary);border:2px solid var(--border-color);border-radius:10px;min-height:44px;padding:10px 16px;font-weight:700}.button--small{font-size:14px;padding:10px 14px;min-height:44px}.full-width{width:100%}.faq details{background:#fff;border:1px solid var(--border-color);border-radius:12px;margin-block:12px;padding:0 20px}.faq summary{font-size:16px;font-weight:700;color:var(--primary);padding-block:18px;cursor:pointer;min-height:48px}.faq details p{padding-bottom:8px;color:var(--text-sub)}.sources{font-size:14px;border-top:1px solid var(--border-color);padding-top:28px;margin-top:40px;color:var(--text-sub)}.sources h2{font-size:19px}.sources li{margin-bottom:12px}.source-note{display:block;color:var(--text-muted);font-size:13px}.review-log{font-size:13px;color:var(--text-muted);padding-top:16px}.ad-placement{margin:36px 0;padding-block:16px;border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color);text-align:center}.ad-label{display:block;font-size:11px;color:var(--text-muted);letter-spacing:.15em;margin-bottom:12px}.adsbygoogle{display:block}.ad-placement ins[data-ad-status=unfilled]{display:none}.calc-form-card h2{font-size:22px}.form-field{margin-block:0 22px}.form-field label,.form-field legend{display:block;font-weight:700;margin-bottom:8px}.form-field input,.form-field select,.form-field textarea,.search-input{display:block;width:100%;min-height:52px;background:#fff;border:2px solid var(--control-border);border-radius:8px;padding:12px 14px;color:var(--text-main);font-size:16px}.form-field textarea{min-height:120px;resize:vertical}.field-help{font-size:13px;color:var(--text-muted);margin:6px 0 0}.field-error{font-size:14px;color:var(--error-text);margin:8px 0 0}.form-field [aria-invalid=true]{border-color:var(--error-text);background:var(--error-bg)}fieldset{border:0;padding:0;margin:0}.form-divider{border-top:1px solid var(--border-color);padding-top:22px}.result-card{border-top:5px solid var(--accent-light);margin-top:24px}.result-card>h2{background:var(--primary);color:#fff;padding:20px 24px;margin:-26px -26px 24px;border-radius:12px 12px 0 0;font-size:21px}.result-value{font-size:38px;line-height:1.4;font-weight:800;color:var(--primary);margin:10px 0 16px;letter-spacing:-.04em}.result-badge{font-size:13px;color:var(--primary);font-weight:800}.summary-row{display:flex;justify-content:space-between;gap:20px;padding:12px 0;border-bottom:1px solid var(--border-color)}.summary-row span{color:var(--text-sub)}.summary-row strong{text-align:right}.result-actions{display:flex;flex-direction:column;gap:10px;border-top:1px solid var(--border-color);padding-top:20px;margin-top:24px}.tool-toolbar{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.tool-toolbar button{flex:1 1 180px}.check-item{display:flex;gap:14px;align-items:flex-start;padding:16px;border:2px solid var(--border-color);border-radius:10px;margin-bottom:12px;background:#fff;cursor:pointer}.check-item:has(input:checked){border-color:var(--teal);background:#f0fdfa}.check-item input{width:22px;height:22px;margin:4px 0;flex-shrink:0;accent-color:var(--teal)}.check-progress{font-weight:800;color:var(--primary);margin-bottom:18px}.editable-output{width:100%;min-height:280px;padding:16px;border:2px solid var(--control-border);border-radius:8px;font:inherit;resize:vertical;background:#fff;color:var(--text-main)}.tool-table{min-width:620px}.remove-row{min-width:44px;min-height:44px;background:#fff;border:1px solid var(--border-color);border-radius:8px;color:var(--error-text)}.search-card{padding:26px;border-radius:18px;background:#fff;border:1px solid var(--border-color)}.search-card label{font-size:20px;font-weight:800;display:block;margin-bottom:12px}.search-meta{font-size:13px;color:var(--text-muted)}.search-result-list{list-style:none;padding:0;margin:20px 0 0}.search-result-list a{display:block;padding:14px 0;min-height:48px}.status-message{font-size:14px;color:var(--primary);margin:12px 0;min-height:24px}.site-footer{border-top:1px solid var(--border-color);background:#fff;padding:36px 0;color:var(--text-sub);font-size:13px}.site-footer .brand{margin-bottom:18px;font-size:18px}.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin-block:22px}.footer-links a{min-height:44px;display:flex;align-items:center}.footer-bottom{border-top:1px solid var(--border-color);padding-top:18px;color:var(--text-muted)}.topic-list{list-style:none;padding:0;counter-reset:topic}.topic-list li{margin:0;border-bottom:1px solid var(--border-color)}.topic-list a{display:flex;gap:16px;align-items:baseline;min-height:58px;padding:16px 0;text-decoration:none;color:var(--text-sub)}.topic-list a:before{counter-increment:topic;content:counter(topic,decimal-leading-zero);font-size:12px;color:var(--text-muted);font-weight:800;min-width:24px}.topic-list a:after{content:'→';margin-left:auto;color:var(--primary)}.downloads{list-style:none;padding:0}.downloads a{display:block;min-height:48px;padding:12px 0}.muted{color:var(--text-muted)}.reading-time{color:var(--text-muted);font-size:13px}.noscript-note{background:var(--warning-bg);padding:16px;border:1px solid #fde68a;border-radius:10px}.legal{font-size:15px;color:var(--text-sub)}
.button svg{width:20px;height:20px;flex:0 0 20px}
@media(hover:hover){.hub-card:hover,.nexus-card:hover{border-color:#93c5fd;box-shadow:0 5px 16px rgba(30,58,138,.08)}.nav-links a:hover{background:var(--primary-bg)}.button:hover,button.primary:hover{background:#172e6d;border-color:#172e6d}.button--secondary:hover,button.secondary:hover{background:var(--primary-bg);color:var(--primary);border-color:#93c5fd}.hero .button--light:hover{background:#eff6ff}.toc a:hover,.topic-list a:hover{color:var(--primary-light);text-decoration:underline}}
@media(max-width:1060px){.menu-toggle{display:block}.header-inner{min-height:68px;flex-wrap:wrap;padding:12px 20px}.nav-links{display:none;width:100%;flex-direction:column;align-items:stretch;border-top:1px solid var(--border-color);padding-top:12px}.nav-links.is-open{display:flex}.nav-links a{white-space:normal;font-size:16px;min-height:48px}.header-note{display:none}.no-js .nav-links{display:flex}}
@media(max-width:600px){main,.content-width{width:calc(100% - 32px)}main{padding-top:24px}h1{font-size:28px}h2{font-size:23px}.hero{padding:28px 22px;border-radius:18px}.hero h1{font-size:30px}.hero>p{font-size:16px}.card,.hub-card,.nexus-card,.procedure-step-card,.calc-form-card,.result-card{padding:20px}.hub-card,.nexus-card{padding-right:48px}.hub-card::after,.nexus-card::after{right:18px;top:20px}.section{margin-top:32px}.section-heading{align-items:flex-start}.section-heading>span{max-width:100px}.hero-actions .button{font-size:15px;padding-inline:14px}.brand{font-size:17px}.brand svg{width:30px;height:34px}.brand small{font-size:9px}.geo-summary-box{padding:20px}.key-table th,.key-table td{padding:12px;font-size:14px}.routes{min-width:470px}.result-card>h2{margin:-20px -20px 20px;padding:18px 20px}.result-value{font-size:32px}.summary-row{flex-direction:column;gap:4px}.summary-row strong{text-align:left}.toc{padding:20px}.meta-line{gap:4px 12px}.page-intro>p{font-size:16px}.faq details{padding-inline:16px}.official-link{padding:20px}}
@media(max-width:350px){.header-inner{padding-inline:16px;gap:8px}.brand{font-size:16px}.brand svg{width:26px}.menu-toggle{min-width:48px}.hero{padding:24px 18px}.hero h1{font-size:28px}.hero-actions .button{font-size:14px}.result-value{font-size:30px}.card,.calc-form-card{padding:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none;transition:none}}
@media print{.site-header,.site-footer,.ad-placement,.hero-actions,.tool-toolbar,.result-actions,.menu-toggle,.search-card,.official-actions,.calc-form-card,.related,.breadcrumb,.toc,.skip-link{display:none}.content-width,main{width:100%;max-width:none;padding:0}body{background:#fff;color:#000;font-size:11pt}.card,.result-card,.procedure-step-card,.notice{box-shadow:none;border-color:#aaa;break-inside:avoid}.result-card>h2{background:#fff;color:#000}.faq details{break-inside:avoid}.faq details>p{display:block}.table-wrap{overflow:visible}.tool-table{min-width:0}h1{font-size:22pt}h2{font-size:17pt}a{color:#000}.prose-section{margin:20px 0}.result-card{display:block}.check-item{padding:8px}.safety-strip{background:#fff}}
