:root{--bg:#f5f6f1;--paper:#fff;--ink:#16202a;--sub:#5b6570;--line:#e3e6df;--brand:#0f766e;--brand-d:#0b5b55;--brand-l:#e6f4f1;--accent:#f59e0b;--r:16px;--sh:0 1px 2px rgba(16,24,40,.04),0 8px 24px -12px rgba(16,24,40,.12)}
@media (prefers-color-scheme:dark){:root{--bg:#0f1417;--paper:#161d21;--ink:#e8ecea;--sub:#9aa5a2;--line:#253035;--brand:#2dd4bf;--brand-d:#5eead4;--brand-l:#123430;--sh:0 1px 2px rgba(0,0,0,.3)}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;font-size:16px;line-height:1.65;word-break:keep-all;-webkit-font-smoothing:antialiased}
a{color:inherit}
img,svg{vertical-align:middle}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:99;background:#fff;padding:8px 12px;border-radius:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* header */
.hd{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.logo-txt{font-weight:800;font-size:21px;letter-spacing:-.02em;display:flex;align-items:baseline;gap:6px}
.logo-txt small{font-size:12px;font-weight:600;color:var(--sub);letter-spacing:0}
.gnb{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;flex:1}
.gnb::-webkit-scrollbar{display:none}
.gnb a{white-space:nowrap;text-decoration:none;font-size:15px;font-weight:600;color:var(--sub);padding:8px 12px;border-radius:999px;transition:.15s}
.gnb a:hover{color:var(--c);background:color-mix(in srgb,var(--c) 10%,transparent)}
.hd-search{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;color:var(--ink);border:1px solid var(--line);background:var(--paper)}
@media (max-width:860px){.hd-in{flex-wrap:wrap;height:auto;padding:10px 20px 0;gap:8px}.gnb{order:3;flex-basis:100%;margin:0 -20px;padding:0 14px 8px}.hd-search{margin-left:auto}}

/* hero */
.hero{background:radial-gradient(1200px 400px at 85% -10%,color-mix(in srgb,var(--brand) 22%,transparent),transparent 60%),radial-gradient(700px 300px at 0% 110%,color-mix(in srgb,var(--accent) 18%,transparent),transparent 60%);border-bottom:1px solid var(--line)}
.hero-in{padding:64px 20px 48px;text-align:center}
.eyebrow{display:inline-block;margin:0 0 14px;font-size:13px;font-weight:700;color:var(--brand);background:var(--brand-l);padding:6px 12px;border-radius:999px}
.hero h1{font-size:clamp(30px,5vw,50px);line-height:1.2;letter-spacing:-.035em;margin:0 0 14px;font-weight:800}
.hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(transparent 62%,color-mix(in srgb,var(--accent) 35%,transparent) 0)}
.hero-sub{color:var(--sub);font-size:clamp(15px,2vw,18px);max-width:620px;margin:0 auto 26px}
.search{display:flex;align-items:center;gap:10px;max-width:620px;margin:0 auto;background:var(--paper);border:2px solid var(--brand);border-radius:18px;padding:0 18px;box-shadow:0 10px 30px -12px color-mix(in srgb,var(--brand) 45%,transparent);color:var(--sub)}
.search input{flex:1;border:0;outline:0;background:transparent;font:inherit;font-size:17px;padding:16px 0;color:var(--ink)}
.hero-chips{justify-content:center;margin-top:22px}

/* chips & cards */
.cat-chips{display:flex;flex-wrap:wrap;gap:8px}
.cat-chips a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;font-weight:600;font-size:14px;padding:8px 14px;border-radius:999px;background:var(--paper);border:1px solid var(--line);color:var(--c);transition:.15s}
.cat-chips a:hover{border-color:var(--c);transform:translateY(-1px)}
.sec{padding:44px 0 8px}
.sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.sec-h h2{font-size:22px;margin:0;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.sec-h p{margin:0;color:var(--sub);font-size:14px;flex-basis:100%}
.sec-h a{font-size:14px;font-weight:600;color:var(--c,var(--brand));text-decoration:none}
.sec-h .cnt{color:var(--sub);font-size:14px}
.dot{width:10px;height:10px;border-radius:50%;background:var(--c)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.cards-big{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.card{position:relative;display:flex;align-items:center;gap:12px;padding:16px 16px;text-decoration:none;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);transition:transform .15s,border-color .15s}
.card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--c) 55%,var(--line))}
.card-ic{flex-shrink:0;display:grid;place-items:center;width:38px;height:38px;border-radius:11px;color:var(--c);background:color-mix(in srgb,var(--c) 12%,transparent)}
.card-body{display:flex;flex-direction:column;min-width:0;flex:1}
.card-cat{font-size:12px;font-weight:700;color:var(--c)}
.card strong{font-size:16px;letter-spacing:-.01em;line-height:1.4}
.card-desc{font-size:13.5px;color:var(--sub);margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.card-big{align-items:flex-start;padding:20px}
.card-go{color:var(--sub);font-weight:700;transition:.15s}
.card:hover .card-go{color:var(--c);transform:translateX(3px)}
.empty{color:var(--sub)}
.why{padding-bottom:56px}
.why h2{font-size:22px;letter-spacing:-.02em}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.why-grid div{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.why-grid b{display:block;margin-bottom:6px;color:var(--brand)}
.why-grid p{margin:0;color:var(--sub);font-size:14.5px}
.other-cats{padding:40px 0 56px}.other-cats h2{font-size:18px}

/* page head */
.phead{--c:var(--brand);background:linear-gradient(180deg,color-mix(in srgb,var(--c) 9%,var(--bg)),var(--bg));border-bottom:1px solid var(--line);padding:22px 0 30px;margin-bottom:28px}
.crumb ol{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0 0 18px;padding:0;font-size:13px;color:var(--sub)}
.crumb li+li:before{content:"›";margin-right:6px;opacity:.6}
.crumb a{text-decoration:none}.crumb a:hover{color:var(--ink)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;color:var(--c);background:color-mix(in srgb,var(--c) 12%,transparent);padding:5px 11px;border-radius:999px}
.phead h1{font-size:clamp(26px,4vw,38px);letter-spacing:-.03em;line-height:1.25;margin:12px 0 10px}
.lead{color:var(--sub);font-size:16.5px;max-width:760px;margin:0}
.meta{font-size:13px;color:var(--sub);margin:12px 0 0}

/* layout */
.grid-page{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start;padding-bottom:60px}
@media (max-width:980px){.grid-page{grid-template-columns:1fr}}
.col-side{position:sticky;top:84px;display:flex;flex-direction:column;gap:14px}
@media (max-width:980px){.col-side{position:static}}
.side-box{--c:var(--brand);background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px 18px 14px}
.side-box h2{font-size:15px;margin:0 0 8px;color:var(--c)}
.side-box ul{list-style:none;margin:0;padding:0}
.side-box li a{display:block;padding:8px 0;border-top:1px dashed var(--line);text-decoration:none;font-size:14.5px}
.side-box li:first-child a{border-top:0}
.side-box li a:hover{color:var(--c)}
.side-box .more{display:inline-block;margin-top:8px;font-size:13px;font-weight:700;color:var(--c);text-decoration:none}

/* calculator */
.calc{background:var(--paper);border:1px solid var(--line);border-radius:22px;box-shadow:var(--sh);overflow:hidden}
.calc-form{padding:24px}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 18px}
@media (max-width:600px){.fields{grid-template-columns:1fr}.calc-form{padding:18px}}
.fld{display:flex;flex-direction:column;gap:6px;min-width:0}
.fld-wide{grid-column:1/-1}
.lab{font-size:14px;font-weight:700}
.help{font-size:12.5px;color:var(--sub)}
.inp{position:relative;display:flex;align-items:center}
.inp input,.fld select,.fld input[type=date],.fld input[type=time]{width:100%;font:inherit;font-size:16.5px;color:var(--ink);background:var(--bg);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;outline:0;transition:border-color .15s,box-shadow .15s;min-height:50px}
.inp input{padding-right:64px;font-variant-numeric:tabular-nums;font-weight:600}
.inp input:focus,.fld select:focus,.fld input:focus{border-color:var(--c);box-shadow:0 0 0 4px color-mix(in srgb,var(--c) 15%,transparent);background:var(--paper)}
.unit{position:absolute;right:14px;font-size:14px;color:var(--sub);pointer-events:none}
.fld select{appearance:none;background-image: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' stroke='%23888' stroke-width='2' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{position:relative;cursor:pointer}
.chip input{position:absolute;opacity:0}
.chip span{display:inline-block;padding:8px 13px;border-radius:999px;border:1.5px solid var(--line);font-size:14px;background:var(--bg);transition:.15s}
.chip input:checked+span{border-color:var(--c);background:color-mix(in srgb,var(--c) 12%,var(--paper));color:var(--c);font-weight:700}
.chip input:focus-visible+span{box-shadow:0 0 0 3px color-mix(in srgb,var(--c) 30%,transparent)}
.actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.btn{font:inherit;font-weight:700;font-size:15px;border-radius:12px;padding:12px 18px;cursor:pointer;border:1.5px solid transparent;text-decoration:none;display:inline-block}
.btn-pri{background:var(--c,var(--brand));color:#fff;flex:1;min-width:140px}
.btn-pri:hover{filter:brightness(1.07)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--c)}
.result{border-top:1px solid var(--line);background:linear-gradient(180deg,color-mix(in srgb,var(--c) 7%,var(--paper)),var(--paper));padding:22px 24px 24px}
.result-empty{color:var(--sub);margin:0}
.res-main{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px}
.res-hero{background:var(--paper);border:1.5px solid color-mix(in srgb,var(--c) 40%,var(--line));border-radius:16px;padding:14px 18px}
.res-hero span{display:block;font-size:13.5px;font-weight:700;color:var(--c)}
.res-hero strong{display:block;font-size:clamp(24px,3.4vw,32px);letter-spacing:-.02em;line-height:1.25;font-variant-numeric:tabular-nums}
.res-rows{margin:14px 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0 24px}
.res-rows div{display:flex;justify-content:space-between;gap:12px;padding:10px 2px;border-bottom:1px dashed var(--line)}
.res-rows dt{color:var(--sub);font-size:14.5px}
.res-rows dd{margin:0;font-weight:700;text-align:right;font-variant-numeric:tabular-nums}
.res-note{margin:14px 0 0;font-size:14px;color:#b45309;background:color-mix(in srgb,#f59e0b 12%,transparent);padding:10px 12px;border-radius:10px}
.tbl-wrap{overflow-x:auto;margin-top:16px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.tbl{width:100%;border-collapse:collapse;font-size:14.5px;font-variant-numeric:tabular-nums}
.tbl th,.tbl td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
.tbl th:first-child,.tbl thead th:first-child{text-align:left}
.tbl thead th{background:color-mix(in srgb,var(--c) 8%,var(--paper));font-size:13px;color:var(--sub)}
.tbl tbody tr:last-child th,.tbl tbody tr:last-child td{border-bottom:0}
.tbl tbody th{font-weight:600}
.gauge{margin-top:16px}
.gauge-bar{position:relative;height:12px;border-radius:999px;background:linear-gradient(90deg,#60a5fa 0 17.5%,#22c55e 17.5% 40%,#facc15 40% 50%,#fb923c 50% 75%,#ef4444 75%)}
.gauge-bar i{position:absolute;top:-3px;width:2px;height:18px;background:var(--paper)}
.gauge-bar b{position:absolute;top:50%;width:20px;height:20px;border-radius:50%;background:var(--paper);border:4px solid var(--ink);transform:translate(-50%,-50%)}
.gauge-lab{display:flex;justify-content:space-between;font-size:12px;color:var(--sub);margin-top:6px}

/* article */
.doc{margin-top:28px;background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:8px 28px 28px}
@media (max-width:600px){.doc{padding:4px 18px 20px}}
.doc .intro{font-size:17px;margin:20px 0 0;padding:16px 18px;border-left:4px solid var(--brand);background:var(--brand-l);border-radius:0 12px 12px 0}
.doc h2{font-size:21px;letter-spacing:-.02em;margin:34px 0 12px;padding-bottom:10px;border-bottom:2px solid var(--line)}
.doc p,.doc li{font-size:16px}
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:10px}
.steps li{counter-increment:s;position:relative;padding:12px 14px 12px 54px;background:var(--bg);border-radius:12px}
.steps li:before{content:counter(s);position:absolute;left:14px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;display:grid;place-items:center;font-size:14px}
.basis{background:var(--bg);border-radius:12px;padding:4px 18px}
.callout{background:color-mix(in srgb,var(--accent) 12%,var(--paper));border:1px solid color-mix(in srgb,var(--accent) 35%,var(--line));border-radius:12px;padding:14px 18px}
.faq details{border:1px solid var(--line);border-radius:12px;margin-bottom:8px;background:var(--paper)}
.faq summary{cursor:pointer;font-weight:700;padding:14px 44px 14px 16px;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:16px;top:10px;font-size:22px;color:var(--brand);transition:.2s}
.faq details[open] summary:after{transform:rotate(45deg)}
.faq details p{margin:0;padding:0 16px 16px;color:var(--sub)}
.caution{margin-top:28px;border-radius:12px;padding:14px 18px;background:var(--bg);border:1px dashed var(--line);font-size:14px;color:var(--sub)}
.caution strong{color:var(--ink)}.caution p{margin:4px 0 0;font-size:14px}
.doc-page{margin:0 0 60px;padding-top:12px}
.doc-page h2{font-size:19px}

/* footer */
.ft{background:var(--paper);border-top:1px solid var(--line);padding:40px 0 28px;font-size:14px;color:var(--sub)}
.ft-top{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.ft-top>div:first-child{max-width:420px}
.ft-logo{font-size:20px;color:var(--ink)}
.ft-cols{display:flex;gap:48px}
.ft-cols div{display:flex;flex-direction:column;gap:6px}
.ft-cols b{color:var(--ink);margin-bottom:4px}
.ft-cols a{text-decoration:none}.ft-cols a:hover{color:var(--brand)}
.ft-copy{margin:28px 0 0;padding-top:18px;border-top:1px solid var(--line);font-size:13px}