:root{
  --paper:#F7F8F5;--card:#FFFFFF;--ink:#15171C;--graphite:#5D6270;--rule:#DDE0DA;--rule2:#C9CDC4;
  --marker:#FFE66D;--green:#0F6B4F;--green-soft:#E6F3EE;--red:#B8412F;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"IBM Plex Sans KR","IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif;
}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.65;font-size:16px}
a{color:inherit;text-decoration:underline;text-decoration-color:var(--rule2);text-underline-offset:3px}a:hover{text-decoration-color:var(--ink)}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* header */
.hdr{border-bottom:1px solid var(--rule);background:var(--paper)}
.hdr .in{max-width:1180px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:24px}
.logo{white-space:nowrap;font-weight:700;font-size:18px;letter-spacing:-.02em;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.logo i{font-style:normal;font-family:var(--mono);background:var(--ink);color:var(--paper);width:24px;height:24px;display:inline-grid;place-items:center;border-radius:4px;font-size:15px}
.nav{display:flex;gap:2px;margin-left:auto;overflow-x:auto}.nav a{padding:6px 10px;font-size:14px;color:var(--graphite);text-decoration:none;white-space:nowrap;border-radius:6px}.nav a:hover{color:var(--ink);background:#fff}
@media(max-width:640px){.hdr .in{padding:12px 16px}.nav{margin-left:0}}

/* layout */
.layout{max-width:1180px;margin:0 auto;padding:28px 20px;display:grid;grid-template-columns:minmax(0,1fr);gap:24px}
.side{display:none}
@media(min-width:1360px){.layout{grid-template-columns:160px minmax(0,1fr) 160px;max-width:1500px}.side{display:block}.side .ad{position:sticky;top:20px}}
@media(max-width:640px){.layout{padding:18px 14px}}
.crumb{font-size:13px;color:var(--graphite);margin-bottom:10px}.crumb a{text-decoration:none}
h1{font-size:30px;line-height:1.25;letter-spacing:-.02em;margin:0 0 8px;font-weight:700}
@media(max-width:640px){h1{font-size:25px}}
.lead{color:var(--graphite);margin:0 0 22px;font-size:16px}
h2{font-size:20px;letter-spacing:-.01em;margin:40px 0 12px;padding-top:18px;border-top:1px solid var(--rule)}
h3{font-size:16px;margin:20px 0 6px}

/* tool card */
.tool{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;align-items:start}
@media(min-width:900px){.tool{grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr)}}
.panel{background:var(--card);border:1px solid var(--rule);border-radius:12px;padding:22px}
.form{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px 16px}
.f{display:flex;flex-direction:column;gap:6px}.f.wide{grid-column:1/-1}
.f label{font-size:13px;color:var(--graphite);font-weight:500}
.f .u{position:relative}.f .u span{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--graphite);font-size:13px;pointer-events:none;font-family:var(--mono)}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid var(--rule2);border-radius:8px;font-size:16px;font-family:inherit;background:#fff;color:var(--ink)}
input[type=number],input[type=date]{font-family:var(--mono)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--ink);outline-offset:-1px;border-color:var(--ink)}
.f .u input{padding-right:44px}
textarea{min-height:180px;resize:vertical;line-height:1.6}
.hint{font-size:12px;color:var(--graphite)}
.btns{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.btn{padding:12px 22px;border:1px solid var(--ink);border-radius:8px;background:var(--ink);color:#fff;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit}
.btn:hover{background:#2a2d35}.btn.ghost{background:#fff;color:var(--ink);border-color:var(--rule2)}.btn.ghost:hover{border-color:var(--ink)}

/* receipt */
.receipt{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:0;position:relative;overflow:hidden}
.receipt:before,.receipt:after{content:"";position:absolute;left:0;right:0;height:10px;background:radial-gradient(circle at 6px 0,transparent 5px,#fff 5.5px) 0 0/12px 10px repeat-x}
.receipt:before{top:-1px;transform:rotate(180deg);background-color:var(--paper)}
.receipt .rc{padding:22px 22px 18px}
.receipt .rh{display:flex;justify-content:space-between;align-items:baseline;font-family:var(--mono);font-size:12px;color:var(--graphite);letter-spacing:.04em;text-transform:uppercase;padding-bottom:12px;border-bottom:1px dashed var(--rule2);margin-bottom:14px}
.receipt .empty{color:var(--graphite);font-size:14px;padding:30px 0;text-align:center}
.big{font-family:var(--mono);font-size:34px;font-weight:600;letter-spacing:-.02em;line-height:1.1;margin:4px 0 4px;word-break:keep-all}
.big mark{background:linear-gradient(transparent 55%,var(--marker) 55%);padding:0 2px}
.big small{display:block;font-family:var(--sans);font-size:13px;color:var(--graphite);font-weight:400;margin-top:6px;letter-spacing:0}
.line{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px dashed var(--rule);font-size:14px}
.line:last-child{border-bottom:0}.line b{font-weight:500}.line .v{font-family:var(--mono);white-space:nowrap}
.line.sum{border-top:1px solid var(--ink);border-bottom:0;margin-top:6px;padding-top:10px;font-weight:600}
.line .v.neg{color:var(--red)}.line .v.pos{color:var(--green)}
.sec{margin-top:14px;font-size:12px;color:var(--graphite);font-family:var(--mono);letter-spacing:.04em}
.note{font-size:13px;color:var(--graphite);margin-top:12px;line-height:1.55}
.tw{overflow-x:auto;margin-top:12px}
table.t{width:100%;border-collapse:collapse;font-size:13px}table.t th,table.t td{padding:7px 8px;border-bottom:1px dashed var(--rule);text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}.receipt table.t td{font-family:var(--mono)}.receipt table.t td:first-child{font-family:var(--sans)}
table.t th:first-child,table.t td:first-child{text-align:left}.prose table.t td{text-align:left;white-space:normal}table.t th{color:var(--graphite);font-weight:500;font-family:var(--sans);border-bottom:1px solid var(--rule2)}

/* share */
.share{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:22px}
.share b{font-size:13px;color:var(--graphite);font-weight:500;margin-right:4px}
.sb{display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border-radius:999px;border:1px solid var(--rule2);background:#fff;cursor:pointer;font-size:13px;font-family:inherit;color:var(--ink)}.sb:hover{border-color:var(--ink)}
.sb.kakao{background:#FEE500;border-color:#FEE500}.sb.x{background:var(--ink);color:#fff;border-color:var(--ink)}.sb.fb{background:#1877F2;color:#fff;border-color:#1877F2}

/* ads: 로드 전에는 공간만 조용히 잡아둔다 */
.ad{display:block;margin:0 0 24px;text-align:center}.ad ins{display:block}
.ad ins[data-ad-status="unfilled"]{display:none}.ad:has(ins[data-ad-status="unfilled"]){margin:0}
.ad-in{margin:28px 0}.ad-in:has(ins[data-ad-status="unfilled"]){margin:0}

/* content */
.prose{max-width:720px}.prose p,.prose li{font-size:15.5px;color:#2a2d35}.prose ul,.prose ol{padding-left:20px}
.prose table{margin:12px 0}
.faq details{border-top:1px dashed var(--rule2);padding:12px 0}.faq details:last-child{border-bottom:1px dashed var(--rule2)}
.faq summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none;display:flex;justify-content:space-between}.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";font-family:var(--mono);color:var(--graphite)}.faq details[open] summary:after{content:"–"}
.faq p{margin:8px 0 0;color:#2a2d35;font-size:15px}

/* tiles */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.tile{display:block;background:#fff;border:1px solid var(--rule);border-radius:10px;padding:14px 16px;text-decoration:none;transition:border-color .15s}
.tile:hover{border-color:var(--ink)}.tile b{display:block;font-size:15px;font-weight:600;margin-bottom:2px}.tile span{font-size:13px;color:var(--graphite)}
.cat{margin:34px 0 10px;display:flex;align-items:baseline;gap:10px}.cat h2{margin:0;padding:0;border:0;font-size:18px}.cat small{font-family:var(--mono);color:var(--graphite);font-size:12px}

/* home */
.hero{padding:40px 0 20px;max-width:760px}
.hero h1{font-size:40px;line-height:1.15}.hero h1 em{font-style:normal;background:linear-gradient(transparent 60%,var(--marker) 60%)}
.hero p{color:var(--graphite);font-size:17px;margin:12px 0 22px}
@media(max-width:640px){.hero{padding:22px 0 10px}.hero h1{font-size:30px}}
.search{position:relative;max-width:480px}.search input{padding-left:40px;font-family:var(--sans)}
.search:before{content:"⌕";position:absolute;left:13px;top:50%;transform:translateY(-50%) scaleX(-1);font-size:20px;color:var(--graphite)}

.ftr{max-width:1180px;margin:30px auto 0;padding:22px 20px 40px;color:var(--graphite);font-size:13px;border-top:1px solid var(--rule);display:flex;flex-wrap:wrap;gap:8px 18px}
.ftr a{text-decoration:none}.ftr a:hover{text-decoration:underline}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(8px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:14px;opacity:0;transition:.2s;pointer-events:none}.toast.on{opacity:1;transform:translateX(-50%)}

/* quiz */
.qcard{background:#fff;border:1px solid var(--rule);border-radius:12px;padding:26px;max-width:720px}
.qintro{color:var(--graphite);margin:0 0 16px}
.qprog{height:4px;background:var(--rule);border-radius:2px;overflow:hidden;margin-bottom:14px}.qprog span{display:block;height:100%;background:var(--ink);width:0;transition:width .25s}
.qnum{font-family:var(--mono);font-size:12px;color:var(--graphite);letter-spacing:.04em}
.qtext{font-size:20px;font-weight:600;line-height:1.4;margin:6px 0 18px;letter-spacing:-.01em}
.qopts{display:grid;gap:8px;margin-bottom:14px}
.qopt{text-align:left;padding:13px 16px;border:1px solid var(--rule2);border-radius:10px;background:#fff;font-size:15px;font-family:inherit;cursor:pointer;color:var(--ink);line-height:1.45}
.qopt:hover{border-color:var(--ink);background:var(--paper)}
.quiz .receipt{max-width:720px}.qdesc{font-size:15px;line-height:1.65;margin-top:10px}.qdesc p{margin:0 0 8px}
/* info */
.meta{display:flex;gap:16px;font-family:var(--mono);font-size:12px;color:var(--graphite);margin:-10px 0 18px}
.toc{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13px;padding:12px 0;border-top:1px dashed var(--rule2);border-bottom:1px dashed var(--rule2);margin:18px 0}.toc b{color:var(--graphite);font-weight:500}.toc a{text-decoration:none;color:var(--ink)}.toc a:hover{text-decoration:underline}
.prose.info{max-width:760px}.prose.info table.t td,.prose.info table.t th{white-space:nowrap}.prose.info .tw{margin:10px 0 18px}
.cat .more{margin-left:auto;font-size:13px;color:var(--graphite);text-decoration:none}.cat .more:hover{color:var(--ink)}
.tool.wide{grid-template-columns:minmax(0,1fr)}.tool.wide .receipt{max-width:none}