/* 사장님 계산실 — 다크 · 오렌지 테마 */
:root{
  color-scheme:dark;
  --bg:#0c0b0a;--bg-2:#121110;--card:#171514;--card-2:#1e1b19;--line:#2a2624;--line-2:#36302c;
  --ink:#f5efe9;--text:#c3bab2;--muted:#8d847c;
  --accent:#ff7a1a;--accent-2:#ff9a4a;--accent-deep:#c2510c;--accent-soft:rgba(255,122,26,.12);
  --pos:#5fe3a1;--neg:#ff7d6b;--err:#ff8a7a;
  --radius:16px;
  --shadow:0 1px 0 rgba(255,255,255,.03) inset,0 10px 30px rgba(0,0,0,.35);
  --font:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,system-ui,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:
  radial-gradient(900px 500px at 85% -10%,rgba(255,122,26,.10),transparent 60%),
  radial-gradient(700px 400px at -10% 30%,rgba(255,122,26,.05),transparent 60%),var(--bg);
  background-attachment:fixed;color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.6;word-break:keep-all;overflow-wrap:break-word}
a{color:var(--accent-2)}
a:hover{color:var(--accent)}
::selection{background:rgba(255,122,26,.35)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* 헤더 */
.site-header{position:sticky;top:0;z-index:20;background:rgba(12,11,10,.78);backdrop-filter:saturate(1.3) blur(14px);border-bottom:1px solid var(--line)}
.site-header .inner{max-width:1100px;margin:auto;padding:0 20px;height:66px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:800;font-size:18px;letter-spacing:-.3px;white-space:nowrap}
.logo:hover{color:var(--ink)}
.logo svg,.logo img{width:32px;height:32px;flex:none}
.logo small{display:block;font-size:10.5px;font-weight:700;letter-spacing:2px;color:var(--accent);line-height:1}
.gnb{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.gnb::-webkit-scrollbar{display:none}
.gnb a{color:var(--text);text-decoration:none;font-size:14.5px;font-weight:600;padding:8px 13px;border-radius:10px;white-space:nowrap;border:1px solid transparent}
.gnb a:hover{background:var(--card-2);color:var(--ink)}
.gnb a[aria-current="page"]{color:#fff;background:linear-gradient(180deg,var(--accent),var(--accent-deep));box-shadow:0 4px 16px rgba(255,122,26,.3)}

/* 레이아웃 */
.container{max-width:1100px;margin:auto;padding:0 20px 80px}
.container.narrow{max-width:840px}
.page-hero{padding:44px 0 28px}
.crumbs{font-size:13px;color:var(--muted);margin:0 0 14px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--accent-2)}
.crumbs span{margin:0 7px;color:#4a433e}
.page-hero h1{font-size:38px;line-height:1.25;letter-spacing:-1px;margin:0 0 14px;color:var(--ink);font-weight:800}
.page-hero p.lead{font-size:17px;color:var(--text);margin:0;max-width:700px}
.meta{font-size:13px;color:var(--muted);margin-top:14px}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;padding:0;list-style:none}
.badges li{font-size:13px;font-weight:600;color:var(--ink);background:var(--card);border:1px solid var(--line-2);border-radius:999px;padding:6px 13px}
.badges li::before{content:"● ";color:var(--accent);font-size:9px;vertical-align:2px}

/* 카드 */
.card{background:linear-gradient(180deg,var(--card-2),var(--card));border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin:0 0 20px;box-shadow:var(--shadow)}
.card h2{font-size:19px;letter-spacing:-.3px;margin:0 0 16px;color:var(--ink)}
article.card h2{font-size:21px;margin:34px 0 12px}
article.card h2:first-child,article.card > section:first-child h2,article.card > h1 + p + h2{margin-top:0}
article.card h3{font-size:17px;margin:24px 0 8px;color:var(--ink)}
article.card h1{font-size:30px;letter-spacing:-.6px;line-height:1.35;margin:0 0 14px}
h1,h2,h3{color:var(--ink)}
p,li{color:var(--text);line-height:1.8}
article.card p,article.card li{font-size:16.5px}
ul{padding-left:20px}
li{margin:6px 0}
li::marker{color:var(--accent)}
strong{color:var(--ink)}
.muted{font-size:13.5px;color:var(--muted)}
.note{background:var(--accent-soft);border:1px solid rgba(255,122,26,.25);border-left:3px solid var(--accent);padding:14px 16px;border-radius:10px;font-size:14.5px;margin-top:24px}
.example{background:var(--bg-2);border:1px solid var(--line-2);border-radius:12px;padding:18px 20px;margin:16px 0}
.example p{margin:6px 0;font-variant-numeric:tabular-nums}
.table-wrap{overflow-x:auto;margin:14px 0 20px;border:1px solid var(--line-2);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left;color:var(--text)}
tr:last-child td{border-bottom:0}
th{background:var(--bg-2);color:var(--ink);font-weight:700;font-size:14px}
td:last-child{text-align:right;font-variant-numeric:tabular-nums;color:var(--ink)}
details{border-bottom:1px solid var(--line);padding:14px 0}
summary{cursor:pointer;font-weight:700;color:var(--ink)}
summary::marker{color:var(--accent)}
details p{margin:10px 0 0}
.cta,.btn{display:inline-block;background:linear-gradient(180deg,var(--accent),var(--accent-deep));color:#fff;border-radius:12px;padding:13px 22px;margin-top:10px;text-decoration:none;font-weight:700;box-shadow:0 6px 20px rgba(255,122,26,.3)}
.cta:hover,.btn:hover{color:#fff;filter:brightness(1.08)}
aside.card .links{list-style:none;padding:0;margin:0}
aside.card .links li{margin:0;border-bottom:1px solid var(--line)}
aside.card .links li:last-child{border-bottom:0}
aside.card .links a{display:flex;justify-content:space-between;gap:12px;padding:13px 0;text-decoration:none;color:var(--ink);font-weight:600}
aside.card .links a::after{content:"→";color:var(--accent)}
aside.card .links a:hover{color:var(--accent-2)}
aside.card h2{font-size:18px}

/* 계산기 */
.layout,.grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:start}
.layout .card,.grid .card{margin:0}
.grid{margin-bottom:20px}
.field{margin-bottom:16px}
label{display:block;font-weight:600;font-size:13.5px;color:var(--text);margin:0 0 8px}
.grid label{margin-top:16px}
.grid label:first-of-type{margin-top:0}
.inputwrap{display:flex;align-items:center;background:var(--bg-2);border:1px solid var(--line-2);border-radius:12px;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.inputwrap:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,122,26,.18)}
.inputwrap input{min-width:0;width:100%;border:0;outline:none;padding:13px 14px;font:inherit;font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums;background:transparent}
.inputwrap span{padding:0 14px;color:var(--muted);font-size:14px;white-space:nowrap}
.inputwrap:has(input[aria-invalid="true"]){border-color:var(--err)}
.grid input{width:100%;font:inherit;font-size:16px;padding:13px 14px;background:var(--bg-2);border:1px solid var(--line-2);border-radius:12px;color:var(--ink);font-variant-numeric:tabular-nums}
.grid input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,122,26,.18)}
.grid select{width:100%;font:inherit;font-size:16px;padding:13px 14px;background:var(--bg-2);border:1px solid var(--line-2);border-radius:12px;color:var(--ink)}
.grid select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,122,26,.18)}
.share-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;margin:18px 0 4px;padding:13px 16px;border:0;border-radius:12px;font:inherit;font-weight:700;font-size:15px;color:#fff;cursor:pointer;background:linear-gradient(180deg,var(--accent),var(--accent-deep));box-shadow:0 6px 20px rgba(255,122,26,.3)}
.share-btn::before{content:"";width:16px;height:16px;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M18 16a3 3 0 0 0-2.4 1.2l-6.7-3.4a3 3 0 0 0 0-1.6l6.7-3.4A3 3 0 1 0 15 7l-6.7 3.4a3 3 0 1 0 0 3.2L15 17a3 3 0 1 0 3-1z'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M18 16a3 3 0 0 0-2.4 1.2l-6.7-3.4a3 3 0 0 0 0-1.6l6.7-3.4A3 3 0 1 0 15 7l-6.7 3.4a3 3 0 1 0 0 3.2L15 17a3 3 0 1 0 3-1z'/%3E%3C/svg%3E") center/contain no-repeat}
.share-btn:hover{filter:brightness(1.08)}
.share-btn.ok{background:#1f6b48;box-shadow:none}
.share-btn.ok::before{display:none}
.field-error{display:block;color:var(--err);font-size:12.5px;margin-top:5px}
.summary,.result{position:sticky;top:86px;overflow:hidden;
  background:radial-gradient(120% 90% at 100% 0%,rgba(255,122,26,.32),transparent 55%),linear-gradient(180deg,#221a14,#141110);
  border:1px solid rgba(255,122,26,.28);box-shadow:0 20px 50px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.02) inset}
.summary h2,.result h2{color:var(--ink)}
.summary p,.result p{color:var(--text)}
.summary .big,.result .big{font-size:42px;font-weight:800;letter-spacing:-1.2px;line-height:1.15;margin:6px 0 16px;word-break:break-word;font-variant-numeric:tabular-nums;color:#fff;text-shadow:0 0 30px rgba(255,122,26,.35)}
.summary .stat{display:flex;justify-content:space-between;gap:12px;padding:13px 0;border-top:1px solid rgba(255,255,255,.08);font-variant-numeric:tabular-nums}
.summary .stat span{color:var(--text)}
.summary strong,.result strong{color:var(--ink)}
.summary .note,.result .note{background:rgba(0,0,0,.25);border-color:rgba(255,255,255,.06);border-left-color:var(--accent);color:var(--text);font-size:12.5px}
.big.positive{color:var(--pos);text-shadow:0 0 30px rgba(95,227,161,.3)}
.big.negative{color:var(--neg);text-shadow:0 0 30px rgba(255,125,107,.3)}
.positive{color:var(--pos)}
.negative{color:var(--neg)}
.err{color:var(--err);font-weight:600}
.hidden{display:none}

/* 홈 탭 */
.tabs{display:inline-flex;gap:4px;margin:0 0 20px;background:var(--card);border:1px solid var(--line);padding:4px;border-radius:14px}
.tabs button{border:0;background:transparent;color:var(--text);padding:10px 18px;border-radius:10px;font:inherit;font-weight:700;font-size:15px;cursor:pointer}
.tabs button:hover{color:var(--ink)}
.tabs button.active{background:linear-gradient(180deg,var(--accent),var(--accent-deep));color:#fff;box-shadow:0 4px 16px rgba(255,122,26,.3)}
.panel{display:none}
.panel.active{display:block}
.guide{margin-top:20px}
.guide h3{font-size:16px;margin:22px 0 6px}
.guide ul{margin:0}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0 20px}
.tool{display:block;background:linear-gradient(180deg,var(--card-2),var(--card));border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:border-color .2s,transform .2s,box-shadow .2s}
.tool:hover{border-color:rgba(255,122,26,.5);transform:translateY(-3px);color:var(--ink);box-shadow:0 14px 34px rgba(255,122,26,.12)}
.tool b{display:block;font-size:16px;margin-bottom:4px}
.tool span{font-size:14px;color:var(--muted)}
.tool i{font-style:normal;display:inline-block;font-size:12px;font-weight:700;color:var(--accent-2);background:var(--accent-soft);border:1px solid rgba(255,122,26,.25);border-radius:7px;padding:2px 9px;margin-bottom:12px}

/* 푸터 */
.site-footer{background:#080707;border-top:1px solid var(--line);color:var(--muted);margin-top:24px}
.site-footer .inner{max-width:1100px;margin:auto;padding:48px 20px 30px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.site-footer h4{color:var(--ink);font-size:14px;margin:0 0 12px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:0 0 8px;line-height:1.5}
.site-footer a{color:var(--muted);text-decoration:none;font-size:14px}
.site-footer a:hover{color:var(--accent-2)}
.site-footer .brand{color:var(--ink);font-weight:800;font-size:17px;margin-bottom:8px}
.site-footer p{color:var(--muted);font-size:13px;line-height:1.7;margin:0}
.site-footer .legal{border-top:1px solid var(--line);margin-top:32px;padding-top:18px;font-size:12.5px;color:#6d655e}

@media(max-width:860px){
  .layout,.grid{grid-template-columns:1fr}
  .summary,.result{position:static}
  .tool-grid{grid-template-columns:1fr}
  .site-footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .site-header .inner{height:auto;flex-wrap:wrap;gap:0;padding:10px 16px 0}
  .gnb{margin:8px -16px 0;padding:0 12px 10px;width:calc(100% + 32px)}
  .gnb a{padding:7px 11px;font-size:14px}
  .container{padding:0 16px 56px}
  .page-hero{padding:28px 0 20px}
  .page-hero h1{font-size:28px}
  article.card h1{font-size:25px}
  .card{padding:20px}
  .tabs{display:flex}
  .tabs button{flex:1;padding:10px 8px;font-size:14px}
  .summary .big,.result .big{font-size:34px}
  .site-footer .cols{grid-template-columns:1fr}
}