*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
:root{--ac:#3182f6;--tx:#191f28;--sub:#6b7684;--line:#e5e8eb;--bg:#f2f4f6}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Pretendard","Malgun Gothic","Noto Sans KR",sans-serif;color:var(--tx);background:#fff;line-height:1.6;word-break:keep-all}
a{color:var(--ac);text-decoration:none}
.wrap{max-width:560px;margin:0 auto;padding:0 20px}
.top{position:sticky;top:0;z-index:5;background:#ffffffee;backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;max-width:960px}
.brand{font-weight:800;font-size:1.1rem;color:var(--tx)}
.nav{display:none;gap:2px}.nav a,.menu nav a{color:var(--sub);padding:8px 10px;border-radius:8px;font-size:.95rem}.nav a[aria-current],.menu a[aria-current]{color:var(--tx);font-weight:700}.nav a:hover{background:var(--bg)}
.menu summary{list-style:none;cursor:pointer;padding:8px 12px;border-radius:8px;font-size:.95rem;color:var(--sub)}.menu summary::-webkit-details-marker{display:none}.menu[open] summary{background:var(--bg)}
.menu nav{position:absolute;right:12px;top:52px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 24px #0000001a;padding:6px;display:flex;flex-direction:column;min-width:170px}.menu nav a{padding:12px 14px}
@media (min-width:860px){.nav{display:flex}.menu{display:none}}
h1{font-size:1.7rem;line-height:1.3;margin:36px 0 6px;letter-spacing:-.02em}
.lead{color:var(--sub);margin:0 0 24px}
.tools{list-style:none;padding:0;margin:8px 0;display:grid;gap:10px}
@media (min-width:600px){.tools{grid-template-columns:1fr 1fr}}
.tools a{display:flex;align-items:center;gap:14px;padding:16px;border-radius:16px;background:var(--bg);color:var(--tx);min-height:72px}.tools a:hover{background:#e8f3ff}
.ic{font-size:1.6rem;width:44px;height:44px;display:grid;place-items:center;background:#fff;border-radius:12px;flex:none}
.tools b{display:block;font-size:1.05rem}.tools small{color:var(--sub)}
.sub{margin:24px 0;font-size:.95rem}
.calc{display:flex;flex-direction:column;gap:18px}
.f{display:flex;flex-direction:column;gap:6px}.l{font-weight:600;font-size:.95rem}
.in{display:flex;align-items:center;border-bottom:2px solid var(--line);transition:border-color .15s}.in:focus-within{border-color:var(--ac)}
.in input{flex:1;border:0;padding:10px 0;font-size:1.35rem;font-weight:600;min-width:0;background:transparent;color:var(--tx);outline:0}.in input::placeholder{font-size:1rem;font-weight:400;color:#b0b8c1}.in em{font-style:normal;color:var(--sub);padding-left:8px}
select{appearance:none;-webkit-appearance:none;padding:14px 40px 14px 14px;border:0;border-radius:12px;font-size:1rem;background:var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%236b7684' stroke-width='2'/%3E%3C/svg%3E") no-repeat right 14px center;width:100%;color:var(--tx)}
.f small{color:var(--sub);font-size:.82rem}.hint{color:var(--ac)!important}
.sw{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:6px 0;cursor:pointer;min-height:48px}.sw>span{display:flex;flex-direction:column}.sw small{color:var(--sub);font-size:.82rem}
.sw input{appearance:none;-webkit-appearance:none;width:50px;height:30px;border-radius:999px;background:#d1d6db;position:relative;flex:none;cursor:pointer;transition:background .15s;margin:0}
.sw input::after{content:"";position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0003;transition:left .15s}.sw input:checked{background:var(--ac)}.sw input:checked::after{left:23px}
.adv summary,.fold summary,.bd summary{cursor:pointer;list-style:none;font-weight:600;padding:14px 0;display:flex;justify-content:space-between;align-items:center}
.adv summary::-webkit-details-marker,.fold summary::-webkit-details-marker,.bd summary::-webkit-details-marker,.tl summary::-webkit-details-marker{display:none}
.adv summary::after,.fold summary::after,.bd summary::after{content:"";width:8px;height:8px;border-right:2px solid var(--sub);border-bottom:2px solid var(--sub);transform:rotate(45deg);margin-right:4px;transition:transform .15s}
.adv[open] summary::after,.fold[open] summary::after,.bd[open] summary::after{transform:rotate(-135deg)}
.adv{border-top:1px solid var(--line)}.adv summary{color:var(--sub)}.adv>div{display:flex;flex-direction:column;gap:18px;padding-bottom:8px}
.result{margin:28px 0;padding:24px;border-radius:20px;background:var(--bg)}
.big{margin:0;color:var(--sub);font-size:.95rem}.big b{display:block;color:var(--tx);font-size:2rem;letter-spacing:-.02em;margin-top:2px;font-variant-numeric:tabular-nums}
.bd{margin-top:12px;border-top:1px solid #dde1e5}.bd summary{color:var(--sub);font-size:.92rem}
.r{width:100%;border-collapse:collapse;font-size:.92rem}.r th{text-align:left;font-weight:400;color:var(--sub);padding:5px 0}.r td{text-align:right;padding:5px 0;font-variant-numeric:tabular-nums}.r .sum th,.r .sum td{font-weight:700;color:var(--tx);padding-top:10px}
.result p:not(.big){font-size:.92rem;color:var(--sub);margin:10px 0 0}.result .warn{color:#8a5a00}
.more{margin:32px 0 16px;border-top:1px solid var(--line)}.fold{border-bottom:1px solid var(--line)}.fold>div{padding:0 0 14px;color:#333d4b;font-size:.94rem}.fold ol,.fold ul{padding-left:20px;margin:0 0 10px}.fold li{margin:4px 0}
.t{width:100%;border-collapse:collapse;font-size:.88rem;margin-top:8px}.t th,.t td{padding:7px 4px;border-bottom:1px solid var(--line);text-align:left}.t th{color:var(--sub);font-weight:600}
.src{font-size:.85rem;color:var(--sub);line-height:1.8}
.chips{display:flex;gap:8px;margin:0 0 8px;overflow-x:auto}.chips button{border:0;background:var(--bg);color:var(--sub);border-radius:999px;padding:9px 16px;font-size:.93rem;cursor:pointer;white-space:nowrap}.chips .on{background:var(--tx);color:#fff}
.tl{list-style:none;padding:0;margin:0}.tl li{border-bottom:1px solid var(--line)}.tl summary{list-style:none;cursor:pointer;display:flex;gap:14px;padding:14px 0;align-items:baseline}.tl time{color:var(--sub);font-size:.85rem;flex:none;width:74px;font-variant-numeric:tabular-nums}.tl p{margin:0 0 10px 88px;font-size:.92rem;color:#333d4b}.tl .src{font-size:.8rem}
.draft{font-style:normal;font-size:.75rem;color:#8a5a00;background:#fff4d6;border-radius:6px;padding:1px 6px;margin-left:4px;white-space:nowrap}
.plain{list-style:none;padding:0}.plain li{padding:12px 0;border-bottom:1px solid var(--line)}.plain b{display:inline-block;width:64px;color:var(--sub);font-weight:600}
.example{background:var(--bg);border-radius:20px;padding:20px;margin:24px 0}.example p{margin:0}.example b{font-size:1.6rem}.example s{color:var(--sub)}.example small{color:var(--sub)}
.btn{display:block;text-align:center;background:var(--ac);color:#fff;padding:16px;border-radius:14px;font-weight:700;font-size:1.05rem}
.srclist{list-style:none;padding:0}.srclist li{padding:10px 0;border-bottom:1px solid var(--line);font-size:.92rem}.srclist small{display:block;color:var(--sub);font-size:.82rem}
.foot{margin-top:40px;padding:20px 0 32px;color:var(--sub);font-size:.8rem;border-top:1px solid var(--line)}.foot p{margin:0}.foot .wrap{max-width:960px}