:root{--accent: #0d9488;--accent-dark: #0f766e;--text: #1f2937;--text-muted: #6b7280;--bg: #ffffff;--bg-soft: #f3f4f6;--border: #e5e7eb;--radius: 12px;--maxw: 720px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;overflow-x:hidden}body{margin:0;font-family:system-ui,Apple SD Gothic Neo,Malgun Gothic,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;display:flex;flex-direction:column;min-height:100vh;overflow-x:hidden}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 16px}main.container{flex:1 0 auto;padding-top:24px;padding-bottom:48px}a{color:var(--accent)}h1,h2,h3{line-height:1.3;color:var(--text)}.site-header{border-bottom:1px solid var(--border);background:var(--bg)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;padding-bottom:12px}.brand{font-weight:700;font-size:1.15rem;color:var(--accent-dark);text-decoration:none}.lang-switch{padding:6px 10px;border:1px solid var(--border);border-radius:8px;font-size:.85rem;font-weight:600;color:var(--text-muted);text-decoration:none;white-space:nowrap}.lang-switch:hover{color:var(--accent);background:var(--bg-soft)}.site-footer{border-top:1px solid var(--border);background:var(--bg-soft);padding:20px 0;margin-top:auto}.footer-nav{display:flex;gap:8px;justify-content:center;font-size:.9rem}.footer-nav a{color:var(--text-muted);text-decoration:none}.footer-nav a:hover{color:var(--accent)}.copyright{text-align:center;color:var(--text-muted);font-size:.8rem;margin:8px 0 0}.calc-form{display:grid;gap:16px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:20px 0}.calc-form label{display:grid;gap:6px;font-weight:600;font-size:.95rem}.calc-form input,.calc-form select{font:inherit;font-size:1rem;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--bg);width:100%}.calc-form .hint{font-weight:400;color:var(--text-muted);font-size:.8rem}.amount-preview{font-weight:500;font-size:.85rem;color:var(--accent-dark);margin-top:4px;min-height:1.2em}.method-toggle{display:flex;flex-wrap:wrap;gap:10px;border:1px solid var(--border);border-radius:8px;padding:12px;margin:0}.method-toggle legend{font-weight:600;font-size:.95rem;padding:0 4px}.calc-form .method-option{display:flex;align-items:center;gap:6px;font-weight:500;cursor:pointer}.calc-form .method-option input{width:auto;margin:0}.calc-form .method-toggle.stacked-options .method-option{width:100%}.calc-form .check-row{display:flex;align-items:center;justify-content:space-between;gap:8px;font-weight:500}.calc-form .check-row input{width:auto;margin:0;order:1;flex-shrink:0}.btn{font:inherit;font-weight:600;color:#fff;background:var(--accent);border:none;border-radius:8px;padding:12px 16px;cursor:pointer}.btn:hover{background:var(--accent-dark)}.result-box{border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:20px 0;background:var(--bg)}.result-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}@media(max-width:540px){.result-grid{grid-template-columns:1fr}}.result-item{background:var(--bg-soft);border-radius:8px;padding:12px;text-align:center}.result-item .label{display:block;font-size:.85rem;color:var(--text-muted)}.result-item .value{display:block;font-size:1.5rem;font-weight:700;color:var(--accent-dark);overflow-wrap:anywhere}table.breakdown{width:100%;border-collapse:collapse;margin-top:12px;font-size:.95rem}table.breakdown th,table.breakdown td{padding:10px 8px;border-bottom:1px solid var(--border);text-align:left}table.breakdown td:last-child,table.breakdown th:last-child{text-align:right;font-variant-numeric:tabular-nums}table.breakdown tr.total td{font-weight:700;border-top:2px solid var(--border)}.disclaimer{font-size:.85rem;color:var(--text-muted);background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:12px;margin:16px 0}.note{font-size:.9rem;color:var(--text-muted)}.faq h3{font-size:1rem;margin-bottom:4px}.faq details{border-bottom:1px solid var(--border);padding:10px 0}.faq summary{cursor:pointer;font-weight:600}.faq p{margin:8px 0 0;color:var(--text-muted);font-size:.95rem}.hidden,.calc-form label.hidden{display:none}