/* 공개 계산기 페이지 (style.css 다음에 읽어요) */
.calc-page{max-width:880px;padding-top:22px;padding-bottom:48px}
.calc-page h1{font-size:clamp(28px,4.4vw,40px);margin-bottom:12px}
.calc-page .lead{font-size:17px;margin-bottom:20px}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:14px;color:var(--ink-3);margin:0 0 14px}
.crumbs a{color:var(--ink-2);text-decoration:none}
.crumbs a:hover{text-decoration:underline}
.calc-alt{color:var(--ink-3);margin:-6px 0 12px;font-weight:600}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 수식 */
.fx{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:14px 16px;margin:0 0 14px;overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch}
.fx .katex-display{margin:.3em 0}
.fx .katex{font-size:1.28em}
.fx-sub .katex{font-size:1.12em}
.sym .katex{font-size:1.12em}
.katex{color:inherit}

/* IP / SI */
.units{display:inline-flex;align-items:center;gap:0;border:1px solid var(--line);border-radius:999px;background:var(--surface);overflow:hidden;margin:0 0 14px}
.units-l{padding:6px 10px 6px 14px;color:var(--ink-3);font-size:14px;font-weight:600}
.units button{border:0;background:none;color:var(--ink-2);padding:7px 14px;font:inherit;font-size:14px;cursor:pointer}
.units button[aria-pressed=true]{background:var(--pen);color:var(--pen-ink)}

/* 계산기 칸 */
.calc-box{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px;margin:22px 0 8px}
.calc-box h2{font-size:22px;margin:0 0 6px}
.calc-box .hint{color:var(--ink-2);font-size:15px;margin:0 0 14px}
.calc .row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,300px);gap:6px 16px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}
.calc .row:first-of-type{border-top:0}
.calc label{display:flex;gap:12px;align-items:baseline;min-width:0;cursor:pointer}
.calc .sym{flex:none;min-width:58px}
.calc .mean{color:var(--ink-2);font-size:15px;line-height:1.4}
.field{display:flex;align-items:center;gap:8px}
.field input,.field select,.conv-in input,.conv-in select,.hub-search input,.tool textarea{font:inherit;color:var(--ink);background:var(--paper);border:1.5px solid var(--line);border-radius:12px}
.field input{flex:1;min-width:0;font-size:18px;padding:9px 12px;font-variant-numeric:tabular-nums}
.field select{flex:1;padding:9px 10px;font-size:16px}
.field input:focus,.conv-in input:focus,.conv-in select:focus,.hub-search input:focus,.tool textarea:focus,.field select:focus{outline:2px solid var(--pen);outline-offset:1px;border-color:var(--pen)}
.field .unit{flex:none;width:92px;color:var(--ink-3);font-size:14px;line-height:1.3;overflow-wrap:anywhere}
.calc .row.out .field input{border-color:var(--pen);background:var(--pen-soft)}
.calc .row.solved .field input{border-color:#1B7A50;background:#DDF1E6;color:#16202A;font-weight:700}
@media (prefers-color-scheme:dark){.calc .row.solved .field input{background:#163A2A;color:#E6EBF1;border-color:#62D69A}}
.calc-btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.calc-page button.btn{border:0;font:inherit;font-weight:600;cursor:pointer;padding:11px 20px}
.calc-page button.btn.ghost{border:1px solid var(--line)}
.calc-res{margin:14px 0 0;font-size:17px;min-height:1.5em}
.calc-res.ok{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;background:var(--pen-soft);border-radius:12px;padding:10px 14px}
.calc-res.ok b{font-size:24px;font-variant-numeric:tabular-nums}
.calc-res .unit{color:var(--ink-2);font-size:15px}
.calc-res.warn{color:#A4460B}
@media (prefers-color-scheme:dark){.calc-res.warn{color:#FFB37A}}

/* 아래 칸들 */
.calc-sec{margin:34px 0}
.calc-sec h2{font-size:22px;margin:0 0 12px}
.calc-p{color:var(--ink-2);margin:12px 0 0;max-width:760px}
.ex-h{font-weight:700;color:var(--ink-2);margin:0 0 6px;font-size:15px}
.given{list-style:none;padding:0;margin:0 0 12px;display:flex;flex-wrap:wrap;gap:8px 20px}
.given li{display:flex;gap:6px;align-items:baseline}
.given .unit{color:var(--ink-3);font-size:14px}
.tbl{overflow-x:auto}
table.vars{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.vars th,.vars td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:baseline}
.vars th{font-size:13px;color:var(--ink-3);font-weight:700}
.vars tr:last-child td{border-bottom:0}
.vars td{color:var(--ink-2)}
.vars td.sym{color:var(--ink);white-space:nowrap}
.vars td.unit{white-space:nowrap;color:var(--ink-3)}
.vars.num td,.vars.num th{text-align:right;font-variant-numeric:tabular-nums}
.rel{list-style:none;padding:0;margin:0 0 10px;display:grid;grid-template-columns:1fr 1fr;gap:8px 18px}
.rel a{text-decoration:none}
.rel a:hover{text-decoration:underline}
.eqs{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.eqs li{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 14px;font-variant-numeric:tabular-nums;color:var(--ink-2)}
.eqs b{color:var(--ink)}
.calc-cta{background:var(--surface);border:2px solid var(--pen);border-radius:22px;padding:22px;margin:40px 0 18px}
.calc-cta h2{font-size:22px;margin:0 0 8px}
.calc-cta p{color:var(--ink-2);margin:0 0 16px}
.calc-note{color:var(--ink-3);font-size:14px}

/* 단위 변환기 */
.conv-in{display:flex;gap:10px;flex-wrap:wrap;margin:6px 0 14px}
.conv-in input{flex:1 1 160px;font-size:22px;padding:10px 14px;font-variant-numeric:tabular-nums;min-width:0}
.conv-in select{flex:1 1 220px;font-size:16px;padding:10px 12px;min-width:0}
.conv-out{width:100%;border-collapse:collapse}
.conv-out td{padding:9px 6px;border-top:1px solid var(--line)}
.conv-out .v{text-align:right;font-size:19px;font-weight:600;font-variant-numeric:tabular-nums;white-space:nowrap;width:42%;padding-right:16px}
.conv-out .u{color:var(--ink-2);font-size:15px}
.conv-out .u b{color:var(--ink);margin-right:4px}
.conv-out tr.from{background:var(--pen-soft)}

/* M&V 도구 */
.paste-l{display:flex;flex-direction:column;gap:2px;margin-bottom:8px}
.paste-l span{color:var(--ink-2);font-size:14px}
.tool textarea{width:100%;font:15px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;padding:10px 12px;resize:vertical;min-height:180px}
.tool h3{font-size:18px;margin:26px 0 4px}
.tool .rep .row:first-of-type{border-top:1px solid var(--line)}
.reg-eq{font-size:20px;font-weight:700;margin:12px 0 4px;font-variant-numeric:tabular-nums}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:12px 0}
.stat-grid div{background:var(--paper);border-radius:12px;padding:10px 12px}
.stat-grid dt{font-size:13px;color:var(--ink-3);font-weight:600}
.stat-grid dd{margin:2px 0 0;font-size:20px;font-weight:700;font-variant-numeric:tabular-nums}
.reg-plot{width:100%;height:auto;background:var(--paper);border-radius:14px;margin-top:6px}
.reg-plot .ax{stroke:var(--ink-3);stroke-width:1}
.reg-plot .gr{stroke:var(--line);stroke-width:1}
.reg-plot .tk{fill:var(--ink-3);font-size:12px}
.reg-plot .lb{fill:var(--ink-2);font-size:13px;font-weight:700}
.reg-plot .pt{fill:var(--pen);fill-opacity:.85}
.reg-plot .fit{stroke:#E0A100;stroke-width:3}
.rep-warn{color:#A4460B;margin:6px 0 0}
.fit-check{margin:4px 0 0;color:var(--ink-2)}
.fit-check b{display:inline-block;margin-right:10px}
.fit-check .pass{color:#1B7A50}.fit-check .miss{color:#C03030}
@media (prefers-color-scheme:dark){.fit-check .pass{color:#62D69A}.fit-check .miss{color:#FF8A8A}.rep-warn{color:#FFB37A}}

/* 목록 페이지 */
.hub-search{display:flex;flex-direction:column;gap:6px;margin:6px 0 14px}
.hub-search label{font-weight:700}
.hub-search input{font-size:18px;padding:12px 14px}
.hub-none{color:var(--ink-3)}
.hub-toc{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 26px}
.hub-toc a{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:14px;text-decoration:none;color:var(--ink-2)}
.hub-toc a:hover{border-color:var(--pen);color:var(--pen)}
.hub-sec{margin:0 0 30px;scroll-margin-top:72px}
.hub-sec h2{font-size:21px;margin:0 0 10px}
.hub-sec h2 small{color:var(--ink-3);font-size:15px;font-weight:600}
.hub-list{list-style:none;padding:0;margin:0;columns:3;column-gap:28px}
@media (max-width:900px){.hub-list{columns:2}}
.hub-list li{break-inside:avoid;padding:4px 0}
.hub-list a{text-decoration:none}
.hub-list a:hover{text-decoration:underline}

@media (max-width:640px){
  .calc-box{padding:16px 14px;border-radius:16px}
  .calc .row{grid-template-columns:minmax(0,1fr);gap:6px}
  .field .unit{width:auto;min-width:56px;max-width:40%}
  .rel{grid-template-columns:1fr}
  .hub-list{columns:1}
  .stat-grid{grid-template-columns:1fr 1fr}
  .fx{padding:10px 12px}
  .fx .katex{font-size:1.14em}
  .calc-page .lead{font-size:16px}
}
.fx-list .katex-display{margin:.55em 0}