:root{
  --bg:#f4f6fb;--card:#fff;--ink:#191f28;--sub:#6b7684;--line:#e5e8ef;--soft:#f2f4f8;
  --brand:#0b9e74;--brand2:#13a8c9;--brand-soft:#e3f6ef;--int:#ffb547;--ok:#12b886;--warn:#c27c0e;
  --r:20px;--shadow:0 1px 2px rgba(25,31,40,.04),0 8px 24px rgba(25,31,40,.06)
}
@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--card:#181c24;--ink:#eef1f6;--sub:#9aa4b2;--line:#262c37;--soft:#1f2430;--brand-soft:#123129;--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25)}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html,body{overflow-x:clip}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 "Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;word-break:keep-all;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}

/* 상단 바 */
.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent)}
.top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px;flex-wrap:wrap}
.brand{font-weight:800;text-decoration:none;color:var(--ink);letter-spacing:-.02em;font-size:17px}
.brand span{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.top nav{display:flex;gap:4px;font-size:14px;overflow-x:auto;scrollbar-width:none}
.top nav a{text-decoration:none;color:var(--sub);white-space:nowrap;padding:6px 10px;border-radius:999px}
.top nav a:hover{background:var(--soft);color:var(--ink)}

/* 히어로 */
.hero{padding:44px 0 22px;text-align:center}
.pill{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:5px 12px;border-radius:999px}
.hero h1{font-size:44px;line-height:1.2;letter-spacing:-.035em;margin:14px 0 10px;font-weight:800}
.hero p{margin:0 auto;max-width:620px;color:var(--sub);font-size:17px}
.hero strong{color:var(--ink)}

/* 계산기 레이아웃 */
.calc{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:20px;align-items:start;margin:8px 0 20px}
.panel{background:var(--card);border-radius:var(--r);padding:24px;box-shadow:var(--shadow)}
.seg{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));background:var(--soft);border-radius:14px;padding:4px;margin-bottom:18px}
.seg label{cursor:pointer}.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;text-align:center;padding:10px 4px;border-radius:11px;font-weight:700;font-size:15px;color:var(--sub);transition:.2s}
.seg input:checked+span{background:var(--card);color:var(--ink);box-shadow:0 2px 8px rgba(25,31,40,.1)}
.seg input:focus-visible+span{outline:2px solid var(--brand)}
.field{display:block;font-weight:700;font-size:14px;color:var(--sub);margin-bottom:16px}
.field em{font-style:normal;font-weight:600;font-size:12px;background:var(--soft);padding:1px 7px;border-radius:6px;margin-left:4px}
.field small{display:block;font-weight:500;font-size:12.5px;margin-top:6px}
.row2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px}
.in{display:flex;align-items:center;background:var(--soft);border:2px solid transparent;border-radius:14px;margin-top:8px;overflow:hidden;transition:.15s}
.in:focus-within{border-color:var(--brand);background:var(--card);box-shadow:0 0 0 4px var(--brand-soft)}
.in input,.in select{flex:1;min-width:0;border:0;padding:13px 14px;font:inherit;font-size:19px;font-weight:700;color:var(--ink);background:transparent;text-align:right;outline:none}
.in.big input{font-size:24px;padding:15px 14px}
.in input[type=date]{text-align:left;font-size:16px}
.in span{padding:0 14px 0 0;color:var(--sub);font-weight:600}
.in.two select{flex:0 0 74px;text-align:center;font-size:16px;cursor:pointer}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.chips button,.btn{border:0;background:var(--soft);color:var(--ink);border-radius:999px;padding:7px 13px;font:inherit;font-size:13px;font-weight:600;cursor:pointer;transition:.15s}
.chips button:hover,.btn:hover{background:var(--brand-soft);color:var(--brand)}
.btn{border-radius:12px;padding:10px 16px;margin-top:12px}
.safe{font-size:12.5px;color:var(--sub);margin:4px 0 0}

/* 결과 */
.sum{position:sticky;top:76px;display:grid;gap:12px}
.sum-card{border-radius:var(--r);padding:26px;color:#fff;background:radial-gradient(120% 120% at 0% 0%,#22c08f 0%,#0b9e74 45%,#1199b8 100%);box-shadow:0 12px 32px rgba(11,158,116,.28)}
.sum-label{font-size:14px;opacity:.85;font-weight:600}
.sum-big{display:block;font-size:42px;font-weight:800;letter-spacing:-.03em;line-height:1.2;margin:6px 0 16px;font-variant-numeric:tabular-nums}
.bar{display:flex;height:10px;border-radius:999px;overflow:hidden;background:rgba(255,255,255,.2)}
.bar i{display:block;height:100%;transition:width .4s ease}#bar-p{background:#fff}#bar-i{background:var(--int)}
.legend{display:flex;gap:16px;font-size:13px;margin-top:10px;opacity:.95;flex-wrap:wrap}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:5px;vertical-align:1px}.dot.p{background:#fff}.dot.i{background:var(--int)}
.sum-card dl{margin:18px 0 0;padding-top:14px;border-top:1px solid rgba(255,255,255,.22);display:grid;gap:6px}
.sum-card dl div{display:flex;justify-content:space-between;gap:10px}
.sum-card dt{opacity:.85;font-size:14px}.sum-card dd{margin:0;font-weight:700;text-align:right;font-variant-numeric:tabular-nums}
.sum-card .note{color:#fff;opacity:.9;background:rgba(255,255,255,.12);border-radius:10px;padding:8px 10px;margin:14px 0 0;font-size:13px}
.sum-card .note:empty{display:none}
.cmp-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.cc{display:flex;flex-direction:column;gap:2px;text-align:left;border:2px solid transparent;background:var(--card);border-radius:16px;padding:12px;font:inherit;color:var(--ink);cursor:pointer;box-shadow:var(--shadow);transition:.15s}
.cc:hover{transform:translateY(-2px)}.cc.on{border-color:var(--brand)}
.cc-t{font-weight:800;font-size:14px}.cc-t em{display:inline-block;font-style:normal;font-size:10.5px;font-weight:700;color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,transparent);padding:1px 6px;border-radius:6px;vertical-align:1px}
.cc-v{font-size:13px;font-weight:700}.cc-s{font-size:12px;color:var(--sub)}

/* 상환표·광고 */
.sched{margin:0 0 20px;padding:6px 24px}
.sched summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none}.sched summary::-webkit-details-marker{display:none}
.sched summary::after{content:"＋";float:right;color:var(--sub)}.sched[open] summary::after{content:"－"}
.sched[open]{padding-bottom:20px}.sched .tw{max-height:420px;overflow:auto;border-radius:12px;border:1px solid var(--line)}
.sched th{position:sticky;top:0}
.ad{margin:20px 0}

/* 본문 */
.content{background:var(--card);border-radius:var(--r);padding:14px 32px 32px;margin-bottom:28px;box-shadow:var(--shadow)}
.content h2{font-size:25px;line-height:1.4;letter-spacing:-.02em;margin:44px 0 12px;scroll-margin-top:80px}
.content p,.content li{color:color-mix(in srgb,var(--ink) 88%,var(--sub))}
.toc{background:var(--soft);border-radius:16px;padding:16px 20px;margin-top:20px}.toc ol{margin:8px 0 0;padding-left:20px}.toc a{text-decoration:none}
.formula{background:var(--brand-soft);border-radius:14px;padding:14px 16px;font-size:15px;margin:14px 0;overflow-x:auto;font-weight:600}
code{background:var(--soft);padding:2px 7px;border-radius:6px;font-size:.9em;word-break:break-all}
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:14.5px;margin:10px 0 18px}
th,td{border-bottom:1px solid var(--line);padding:11px 10px;text-align:left;vertical-align:top}
th{background:var(--soft);font-size:13px;white-space:nowrap;color:var(--sub);font-weight:700}
.n{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums}
.faq{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:700;padding:16px 28px 16px 0;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:4px;top:24px;width:8px;height:8px;border-right:2px solid var(--sub);border-bottom:2px solid var(--sub);transform:rotate(45deg);transition:.2s}
.faq[open] summary::after{transform:rotate(-135deg);top:28px}
.faq div{padding:0 0 16px;color:var(--sub)}
.mini{background:var(--soft);border-radius:16px;padding:20px;margin:16px 0}
.mini .grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.mini label{display:block;font-weight:700;font-size:14px;color:var(--sub)}.mini label small{display:block;font-weight:500;font-size:12px;margin-top:4px}
.mini .in{background:var(--card)}
.mini .result{margin-top:14px;display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:8px;background:var(--card);border-radius:14px;padding:14px 16px}
.mini .r{display:flex;justify-content:space-between;width:100%;align-items:baseline}.mini .r span{color:var(--sub);font-weight:600}.mini .r b{font-size:24px;color:var(--brand)}
.note{font-size:13px;color:var(--warn);margin:4px 0 0}
.disclaimer,.author{font-size:14px;border-radius:16px;padding:16px 18px;margin-top:24px;background:var(--soft)}
.upd{display:block;color:var(--sub);font-size:12.5px;margin-top:6px}

/* 하단·보조 페이지 */
.foot{padding:28px 0 40px;font-size:13.5px;color:var(--sub)}
.foot nav{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:6px}.foot a{color:var(--sub);text-decoration:none}.foot a:hover{color:var(--ink)}
.page{background:var(--card);border-radius:var(--r);padding:14px 32px 32px;margin:24px 0 28px;box-shadow:var(--shadow)}
.page h1{font-size:30px;letter-spacing:-.03em;margin:22px 0 10px}.page h2{font-size:20px;margin:30px 0 8px}

@media (max-width:860px){.calc{grid-template-columns:minmax(0,1fr)}.sum{position:static}}
@media (max-width:640px){
  .hero{padding:30px 0 14px}.hero h1{font-size:34px}.hero p{font-size:15.5px}.pc{display:none}
  .panel{padding:18px}.sum-card{padding:22px}.sum-big{font-size:34px}
  .cmp-cards{grid-template-columns:minmax(0,1fr)}.cc{flex-direction:row;justify-content:space-between;align-items:center;flex-wrap:wrap}
  .content,.page{padding:6px 18px 22px}.content h2{font-size:21px}.mini .grid{grid-template-columns:1fr}
  .top nav{width:100%;padding-bottom:8px}
}

/* 모바일: 결과가 화면 밖이면 아래에 요약 띠 */
.mbar{display:none}
@media (max-width:860px){
  .mbar{position:fixed;left:12px;right:12px;bottom:12px;z-index:20;display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:16px;text-decoration:none;color:#fff;background:linear-gradient(100deg,#0b9e74,#1199b8);box-shadow:0 10px 28px rgba(11,158,116,.35);transform:translateY(140%);transition:transform .25s}
  .mbar.show{transform:none}
  .mbar span{font-size:13px;opacity:.85}.mbar b{font-size:18px;font-variant-numeric:tabular-nums}.mbar em{margin-left:auto;font-style:normal;font-size:13px;font-weight:700;opacity:.95}
}

/* 질문 탭 */
.qtabs{display:flex;justify-content:center;gap:10px;margin:4px 0 18px;flex-wrap:wrap}
.qt{display:flex;align-items:center;gap:8px;border:2px solid transparent;background:var(--card);color:var(--sub);font:inherit;font-weight:800;font-size:17px;padding:12px 22px;border-radius:999px;cursor:pointer;box-shadow:var(--shadow);transition:.2s}
.qt span{font-size:20px}.qt:hover{color:var(--ink)}
.qt.on{color:#fff;border-color:transparent;background:linear-gradient(135deg,var(--brand),#13a8c9);box-shadow:0 8px 22px rgba(11,158,116,.35)}
.qt:focus:not(:focus-visible){outline:none}
.btn.wide{width:100%;margin:0;padding:14px;font-size:15px;background:var(--card);box-shadow:var(--shadow)}
[hidden]{display:none!important}
@media (max-width:640px){.qt{flex:1;justify-content:center;font-size:15px;padding:11px 10px}.qt span{font-size:17px}}

/* 개별 계산기 페이지 */
.top nav a[aria-current=page]{background:var(--brand-soft);color:var(--brand);font-weight:700}
.seg span br{display:none}
.lab{font-weight:700;font-size:14px;color:var(--sub);margin:0 0 8px}
.lab em{font-style:normal;font-weight:600;font-size:12px;background:var(--soft);padding:1px 7px;border-radius:6px;margin-left:4px}
.hint{display:block;font-size:12.5px;color:var(--sub);margin:-10px 0 16px}
.check{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;margin:12px 0 16px;cursor:pointer}
.check input{width:18px;height:18px;accent-color:var(--brand)}
.field small b{color:var(--brand);font-weight:700}
.verdict{margin:0;padding:14px 16px;border-radius:16px;font-size:14px;font-weight:600;background:var(--card);box-shadow:var(--shadow)}
.verdict:empty{display:none}
.verdict.ok{color:var(--ok)}
.verdict.no{color:var(--warn)}
a.btn.wide{display:block;text-align:center;text-decoration:none;color:var(--brand)}
.panel.tight{padding:6px 14px}
.panel.tight table{margin:6px 0}
.tag{display:inline-block;font-size:11px;font-weight:700;color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,transparent);padding:1px 6px;border-radius:6px}
.chart{margin-top:6px;color:var(--sub)}
.chart svg{display:block;width:100%;height:auto}
.legend2{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--sub);margin-top:6px}
.legend2 i{display:inline-block;width:14px;height:4px;border-radius:2px;margin-right:6px;vertical-align:3px}
.sources{font-size:14px;border-radius:16px;padding:16px 18px;margin-top:24px;border:1px solid var(--line)}
.sources ul{margin:8px 0 0;padding-left:18px}
.sources li{margin:2px 0}
.more{margin:0 0 28px}
.more h2{font-size:20px;margin:0 0 12px}
.more-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.more-grid a{display:flex;justify-content:space-between;align-items:center;background:var(--card);border-radius:16px;padding:16px 18px;text-decoration:none;color:var(--ink);font-weight:700;box-shadow:var(--shadow);transition:.15s}
.more-grid a:hover{transform:translateY(-2px);color:var(--brand)}
.more-grid span{color:var(--brand)}
@media (max-width:640px){.seg span br{display:inline}.more-grid{grid-template-columns:1fr 1fr}}

/* 평수 사이트 */
.top nav a[aria-current=page]{background:var(--brand-soft);color:var(--brand);font-weight:700}
.lab{font-weight:700;font-size:14px;color:var(--sub);margin:0 0 8px}
.field small b{color:var(--brand);font-weight:700}
.swap{display:flex;justify-content:center;margin:-6px 0 10px;font-size:22px;color:var(--sub)}
.verdict{margin:0;padding:14px 16px;border-radius:16px;font-size:14px;font-weight:600;background:var(--card);box-shadow:var(--shadow)}
.verdict:empty{display:none}
.verdict.ok{color:var(--ok)}
.qtable td,.qtable th{text-align:center}
.qtable tr{cursor:pointer}
.qtable tbody tr:hover td{background:var(--brand-soft)}
.rows{display:grid;gap:8px;margin-bottom:12px}
.room{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr) auto;gap:6px;align-items:center}
.room input{width:100%;min-width:0;border:2px solid transparent;background:var(--soft);border-radius:12px;padding:10px;font:inherit;font-weight:700;color:var(--ink);text-align:right;outline:none}
.room input:focus{border-color:var(--brand);background:var(--card)}
.room input.name{text-align:left;font-weight:600}
.room output{grid-column:1/-1;font-size:12.5px;color:var(--sub);margin:-2px 0 4px 4px}
.room button{border:0;background:none;color:var(--sub);font-size:18px;cursor:pointer;padding:4px 8px}
.rhead{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr) auto;gap:6px;font-size:12.5px;color:var(--sub);font-weight:700;padding:0 4px}
.rhead i{width:34px}
.sources{font-size:14px;border-radius:16px;padding:16px 18px;margin-top:24px;border:1px solid var(--line)}
.sources ul{margin:8px 0 0;padding-left:18px}
.more{margin:0 0 28px}
.more h2{font-size:20px;margin:0 0 12px}
.more-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.more-grid a{display:flex;justify-content:space-between;align-items:center;background:var(--card);border-radius:16px;padding:16px 18px;text-decoration:none;color:var(--ink);font-weight:700;box-shadow:var(--shadow);transition:.15s}
.more-grid a:hover{transform:translateY(-2px);color:var(--brand)}
.more-grid span{color:var(--brand)}
@media (max-width:640px){.more-grid{grid-template-columns:1fr 1fr}}
.lab em{font-style:normal;font-weight:600;font-size:12px;background:var(--soft);padding:1px 7px;border-radius:6px;margin-left:4px}
.in span i{font-style:normal}