:root{--bg:#f8faf9;--surface:#fff;--text:#18181b;--text-soft:#3f3f46;--muted:#71717a;--border:#e4e4e7;--brand:#0f766e;--brand-soft:#ccfbf1;--accent:#b45309;--error:#b91c1c;--radius:12px}@media (prefers-color-scheme:dark){:root{--bg:#111413;--surface:#1b1f1e;--text:#f4f4f5;--text-soft:#d4d4d8;--muted:#a1a1aa;--border:#2f3533;--brand:#2dd4bf;--brand-soft:#134e4a;--accent:#fbbf24;--error:#fca5a5}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);word-break:keep-all;overflow-wrap:break-word;margin:0;font-family:Pretendard,system-ui,-apple-system,Malgun Gothic,sans-serif;line-height:1.7}a{color:var(--brand)}.container{max-width:760px;margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.header-inner{justify-content:space-between;align-items:center;gap:16px;min-height:60px;display:flex}.logo{color:var(--text);font-size:1.25rem;font-weight:800;text-decoration:none}.logo span{color:var(--brand)}.site-header nav{gap:16px;font-size:.95rem;display:flex}.site-header nav a{color:var(--text-soft);text-decoration:none}.site-footer{border-top:1px solid var(--border);color:var(--muted);margin-top:64px;padding:32px 0;font-size:.85rem}.site-footer p{margin:4px 0}h1{letter-spacing:-.02em;margin:40px 0 8px;font-size:1.9rem;line-height:1.35}.lead{color:var(--text-soft);margin:0 0 32px;font-size:1.05rem}h2{margin:48px 0 16px;font-size:1.3rem}h3{margin:24px 0 8px;font-size:1.05rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}.muted{color:var(--muted)}.form{gap:20px;display:grid}.field label{margin-bottom:6px;font-weight:600;display:block}.field .hint{color:var(--muted);min-height:1.2em;margin-top:4px;font-size:.85rem}.input-row{gap:8px;display:flex}input,select{background:var(--bg);width:100%;min-width:0;color:var(--text);border:1px solid var(--border);font:inherit;font-variant-numeric:tabular-nums;border-radius:8px;padding:12px 14px}input:focus,select:focus{outline:2px solid var(--brand);outline-offset:1px}.unit{color:var(--muted);flex-shrink:0;align-self:center}.segmented{grid-template-columns:repeat(3,1fr);gap:6px;display:grid;position:relative}.segmented input{opacity:0;pointer-events:none;width:1px;height:1px;padding:0;position:absolute}.segmented label{border:1px solid var(--border);text-align:center;cursor:pointer;border-radius:8px;margin:0;padding:10px 8px;font-weight:500}.segmented input:checked+label{background:var(--brand-soft);border-color:var(--brand);color:var(--text);font-weight:700}.segmented input:focus-visible+label{outline:2px solid var(--brand)}.error{color:var(--error)}.summary{grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px;display:grid}.summary div{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.summary dt{color:var(--muted);font-size:.85rem}.summary dd{font-variant-numeric:tabular-nums;margin:4px 0 0;font-size:1.25rem;font-weight:800}.summary .primary{border-color:var(--brand);background:var(--brand-soft)}.summary small{color:var(--muted);font-size:.8rem;font-weight:400;display:block}table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:.92rem}th,td{border-bottom:1px solid var(--border);text-align:right;white-space:nowrap;padding:10px 8px}th:first-child,td:first-child{text-align:left}th{color:var(--muted);font-weight:600}.table-wrap{overflow-x:auto}tr.best td{color:var(--brand);font-weight:700}details>summary{cursor:pointer;font-weight:600}.explain p,.explain li{color:var(--text-soft)}.formula{background:var(--surface);border-left:3px solid var(--brand);border-radius:0 8px 8px 0;padding:14px 16px;font-size:.95rem}.notice{background:var(--surface);border:1px dashed var(--border);color:var(--muted);border-radius:8px;margin-top:32px;padding:14px 16px;font-size:.88rem}.tools{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.tool{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-decoration:none;display:block}a.tool:hover{border-color:var(--brand)}.tool strong{font-size:1.05rem;display:block}.tool span{color:var(--muted);font-size:.88rem}.tool.soon{opacity:.55}.tool .tag{border:1px solid var(--border);border-radius:999px;margin-top:8px;padding:0 8px;font-size:.75rem;display:inline-block}@media (width<=560px){h1{font-size:1.6rem}.summary,.tools{grid-template-columns:1fr}}
