/* ================================================================
   Mass Concrete Temperature Control - global styles
================================================================ */
:root{
  --bg:#f4f6fa; --panel:#ffffff; --ink:#1f2937; --muted:#6b7280;
  --line:#dfe4ee; --brand:#0b6bc3; --brand-dk:#094f92;
  --accent:#e8730c; --ok:#168a4e; --warn:#e2a300; --bad:#d64545;
  --radius:12px; --shadow:0 1px 3px rgba(16,28,50,.08),0 6px 18px rgba(16,28,50,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,
    "Noto Sans","Noto Sans SC","Noto Sans KR","Noto Sans JP",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.55;
  -webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{margin:0;line-height:1.25;font-weight:700}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------------- topbar ---------------- */
.topbar{background:linear-gradient(180deg,#ffffff,#f7fafd);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:10px 20px;position:sticky;top:0;z-index:50}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:10px;background:linear-gradient(135deg,var(--brand),#2f9be0);color:#fff;font-size:20px}
.brand-name{display:block;font-size:15px;letter-spacing:.2px}
.brand-sub{display:block;font-size:11px;color:var(--muted);font-weight:400}
.mainnav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.mainnav a{padding:8px 12px;border-radius:8px;color:var(--ink);font-weight:500;font-size:14px}
.mainnav a:hover{background:#eef3f9;text-decoration:none}
.mainnav a.active{background:var(--brand);color:#fff}
.top-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.top-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:8px;
  border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:500;font-size:13px}
.top-btn:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;background:#f3f8fd}
.langsel{display:inline-flex;align-items:center;gap:6px;margin-left:4px}
.lang-caption{font-size:12px;color:var(--muted)}
.langsel select{padding:7px 8px;border:1px solid var(--line);border-radius:8px;background:#fff;font-family:var(--font);font-size:13px;cursor:pointer;max-width:150px}

/* ---------------- hero (home) ---------------- */
.hero{background:linear-gradient(135deg,#0b5ca6 0%,#1b7fd0 55%,#2f9be0 100%);color:#fff;
  padding:64px 20px 58px;text-align:center}
.hero .kicker{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);
  padding:5px 14px;border-radius:999px;font-size:12px;letter-spacing:.4px;margin-bottom:18px}
.hero h1{font-size:clamp(26px,4vw,42px);margin:0 0 16px}
.hero p{max-width:760px;margin:0 auto 26px;font-size:16px;opacity:.95}
.hero-cta{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;
  padding:14px 26px;border-radius:10px;font-weight:700;font-size:16px;box-shadow:0 8px 20px rgba(0,0,0,.18)}
.hero-cta:hover{background:#d56500;text-decoration:none}
.hero-note{margin-top:16px;font-size:12.5px;opacity:.85}

.section{max-width:1180px;margin:34px auto;padding:0 20px}
.section h2{font-size:22px;margin-bottom:6px}
.section .lead{color:var(--muted);margin:0 0 22px}

/* ---------------- cards ---------------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow)}
.card .ico{width:42px;height:42px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:#eaf2fb;color:var(--brand);font-size:20px;margin-bottom:12px}
.card h3{font-size:16px;margin-bottom:6px}
.card p{color:var(--muted);font-size:13.5px;margin:0}

.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:8px}
.step{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.step .num{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;
  background:var(--brand);color:#fff;font-weight:700;margin-bottom:10px}
.step p{color:var(--muted);font-size:13.5px;margin:0}

.cta-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-weight:600;border:1px solid transparent}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dk);text-decoration:none}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}

/* ---------------- panel (page header) ---------------- */
.page-head{background:linear-gradient(135deg,#0b5ca6,#1b7fd0);color:#fff;padding:34px 20px}
.page-head h1{font-size:clamp(22px,3vw,30px);margin-bottom:6px}
.page-head p{max-width:820px;margin:0;opacity:.92;font-size:14.5px}

.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;margin:24px auto}

/* ---------------- forms ---------------- */
.grid{display:grid;gap:14px}
.grid.two{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.grid.three{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:5px}
.field input,.field select{width:100%;padding:10px 11px;border:1px solid var(--line);border-radius:9px;
  font-size:14px;font-family:var(--font);background:#fff;color:var(--ink)}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,107,195,.12)}
.field .unit{font-size:11px;color:var(--muted);margin-left:4px}
.form-group{border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px}
.form-group h3{font-size:15px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.form-group h3 .g-num{width:24px;height:24px;border-radius:7px;background:#eaf2fb;color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px}
.hint{font-size:12px;color:var(--muted);margin-top:8px}
.form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}

details.adv{border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin-top:6px}
details.adv summary{cursor:pointer;font-weight:600;color:var(--brand);font-size:14px;padding:2px 0}
details.adv .adv-body{padding-top:12px}

/* ---------------- results ---------------- */
.res-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12.5px;font-weight:700}
.badge.ok{background:#e5f6ec;color:var(--ok)}
.badge.bad{background:#fdeaea;color:var(--bad)}
.badge.warn{background:#fdf3dd;color:var(--warn)}

.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:16px 0 6px}
.kpi{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:14px}
.kpi .k-label{font-size:12px;color:var(--muted)}
.kpi .k-value{font-size:22px;font-weight:700;margin-top:4px}
.kpi .k-sub{font-size:11px;color:var(--muted);margin-top:2px}

table.dtable{width:100%;border-collapse:collapse;font-size:13px;margin:12px 0}
table.dtable th,table.dtable td{border:1px solid var(--line);padding:8px 9px;text-align:right;white-space:nowrap}
table.dtable th{background:#eef3f9;font-weight:600;text-align:center;font-size:12px}
table.dtable td:first-child{text-align:center;font-weight:600}
table.dtable tr:nth-child(even) td{background:#fafcff}
table.dtable .num-special{color:var(--brand);font-weight:600}
table.dtable .isover{color:var(--bad);font-weight:700}

.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.eq{font-weight:700;color:var(--brand-dk)}
.block{margin:22px 0}
.block.h-hidden{display:none}
.block-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;border-bottom:2px solid var(--line);padding-bottom:8px;margin-bottom:8px}
.block-title .en{font-size:11px;color:var(--muted);font-weight:500}

.conclusion{border-left:5px solid var(--brand);background:#f0f6fd;padding:16px 18px;border-radius:8px;margin-top:6px}
.conclusion.ok{border-color:var(--ok);background:#effaf4}
.conclusion.bad{border-color:var(--bad);background:#fdf2f2}
.conclusion h4{margin:0 0 6px}
.conclusion p{margin:0;color:#374151}

.check-row{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 4px;border-bottom:1px dashed var(--line)}
.check-row:last-child{border-bottom:none}
.check-row .c-label{font-size:14px}
.check-row .c-val{margin-left:auto;font-weight:700}

.chart{width:100%;margin:6px 0}

/* ---------------- method / reference ---------------- */
.formula{font-family:Georgia,"Times New Roman",serif;font-size:18px;color:var(--brand-dk);
  background:#f4f8fd;border:1px solid var(--line);border-left:4px solid var(--brand);
  border-radius:8px;padding:12px 16px;margin:10px 0}
.m-row{border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin:10px 0;background:#fff}
.m-row h3{margin:0 0 6px}
.m-row ul,.m-row ol{margin:6px 0 0;padding-left:20px;color:#374151}
.m-row li{margin:2px 0}
table.rtable{width:100%;border-collapse:collapse;font-size:12.5px;margin:8px 0}
table.rtable th,table.rtable td{border:1px solid var(--line);padding:6px 8px;text-align:right}
table.rtable th{background:#eef3f9;font-weight:600;text-align:center}
table.rtable td:first-child{text-align:center;font-weight:600}

/* ---------------- footer ---------------- */
.site-footer{background:#10233b;color:#c8d3e2;margin-top:48px}
.foot-inner{max-width:1180px;margin:0 auto;padding:34px 20px 28px}
.foot-brand{color:#fff;font-size:16px;display:flex;align-items:center;gap:10px;margin-bottom:12px}
.foot-note{font-size:13px;opacity:.85;margin:6px 0}
.foot-contact a{color:#ffd9a8}
.foot-copy{font-size:12px;opacity:.7;margin-top:16px;border-top:1px solid rgba(255,255,255,.12);padding-top:14px}
.foot-copy a{color:#ffd9a8}

/* ---------------- responsive ---------------- */
@media (max-width:760px){
  .topbar{gap:10px}
  .brand-sub{display:none}
  .mainnav{order:3;flex-basis:100%}
  .mainnav a{flex:1;text-align:center;padding:9px 4px;font-size:13px}
  .top-actions{margin-left:auto}
  .lang-caption{display:none}
  .hero{padding:44px 16px}
  .section{padding:0 14px}
  .panel{padding:16px}
  .ext-head{flex-direction:column;align-items:stretch}
}

/* ================================================================
   Extended tools (scenarios · sweep · report · measures)
================================================================ */
.ext-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.ext-hint{font-size:12.5px;color:var(--muted);margin:0 0 14px}

/* scenario list */
.scen-list{display:flex;flex-direction:column;gap:8px;margin-top:4px}
.scen-item{display:flex;align-items:center;gap:8px;padding:9px 12px;
  border:1px solid var(--line);border-radius:10px;background:#fff;flex-wrap:wrap}
.scen-item .scen-name{flex:1;font-weight:600;font-size:13.5px;min-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.scen-save-row{display:flex;gap:8px;flex-wrap:wrap}
.scen-save-row input{flex:1;padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:13px;font-family:var(--font);min-width:160px}
.scen-actions{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 2px}
#scenMsg{font-size:12.5px;margin:6px 0 0;min-height:16px}
#scenChartWrap .chart{margin:6px 0 0}

/* small buttons */
.mini-btn{padding:5px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;
  color:var(--ink);font-size:12px;font-weight:600;cursor:pointer;font-family:var(--font)}
.mini-btn:hover{border-color:var(--brand);color:var(--brand)}
.mini-btn.on{background:#eaf2fb;border-color:var(--brand);color:var(--brand)}
.mini-btn.danger:hover{border-color:var(--bad);color:var(--bad);background:#fdf2f2}

/* sweep */
.sweep-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;align-items:end}
.sweep-row select,.sweep-row input{width:100%;padding:9px 10px;border:1px solid var(--line);border-radius:9px;
  font-size:13px;font-family:var(--font);background:#fff;color:var(--ink)}
.sweep-meta{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 4px}
.sweep-limit{font-size:11.5px;color:var(--muted);background:#f4f6fa;border:1px solid var(--line);
  border-radius:999px;padding:3px 10px}
.sweep-bad{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px}
.sweep-bad.ok{background:#e5f6ec;color:var(--ok)}
.sweep-bad.bad{background:#fdeaea;color:var(--bad)}
.k-inf{color:var(--muted)}

/* measures */
.ext-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.ext-card{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#fff}
.ext-card h4{margin:0 0 10px;font-size:14px}
dl.kv{margin:6px 0 4px}
dl.kv dt{font-size:12px;color:var(--muted);float:left;clear:left;width:56%}
dl.kv dd{font-size:13px;font-weight:700;margin:0 0 4px 58%;text-align:right}
dl.kv dd.down{color:var(--ok)}
.measure-line{font-size:13px;font-weight:600;margin-bottom:6px}
.winter-led{cursor:default}
.winter-led.ok{color:var(--ok)} .winter-led.cold{color:var(--bad)}

/* report preview */
#reportHost{display:none;margin-top:6px}
.rep-head{border-bottom:2px solid var(--brand);padding-bottom:10px;margin-bottom:12px}
.rep-head .rep-brand{font-weight:800;color:var(--brand);font-size:13px}
.rep-head .rep-brand span{font-weight:500;color:var(--muted)}
.rep-head h1{margin:6px 0 4px;font-size:20px}
.rep-meta{font-size:12px;color:var(--muted)}
.rep-status{display:inline-block;margin-top:8px;padding:4px 12px;border-radius:999px;font-weight:700;font-size:12px}
.rep-status.ok{background:#e5f6ec;color:var(--ok)}
.rep-status.bad{background:#fdeaea;color:var(--bad)}
.rep-kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:12px 0}
.rep-kpis > div{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.rep-kpis span{display:block;font-size:11px;color:var(--muted)}
.rep-kpis b{font-size:16px}
#reportHost h2{font-size:15px;margin:16px 0 4px}
.rep-note{font-size:11.5px;color:var(--muted);margin-top:6px}

/* ---------------- governing standard panel ---------------- */
.std-active{min-height:38px;display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:0 2px}
.std-chip{font-weight:700;color:var(--brand);font-size:14px}
.stdd-limits,.std-limits{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px;margin:10px 0 4px}
.sl-cell{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:6px 8px}
.sl-key{display:block;font-size:11px;color:var(--muted)}
.sl-val{display:block;font-weight:700;font-size:14px;color:#111827}
.std-checks{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px;margin-top:12px}
.sc{border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.sc .sc-l{display:block;font-size:11px;color:var(--muted)}
.sc .sc-v{display:block;font-weight:700;font-size:14px;color:#111827;margin-top:2px}
.sc .sc-s{display:inline-block;margin-top:4px;padding:1px 8px;border-radius:999px;font-weight:700;font-size:11px}
.sc.ok .sc-s{background:#e5f6ec;color:var(--ok)}
.sc.bad .sc-s{background:#fdeaea;color:var(--bad)}

/* ---------------- print ---------------- */
@media print{
  body{background:#fff}
  .topbar,.site-footer,.page-head,.form-actions,form,.ext-head,.scen-list,
  .scen-save-row,.scen-actions,.sweep-row,.sweep-meta,.mini-btn,.btn{display:none !important}
  #extWrap,#extTabs,#manNav,.mainnav{display:none !important}
  #resultPanel{display:none !important}
  .panel{box-shadow:none;border:none;margin:0;padding:0}
  #reportHost{display:block !important}
  .rep-block h2{break-after:avoid}
  table.dtable{font-size:10.5px}
  thead{display:table-header-group}
  tr{break-inside:avoid}
}
@page{size:A4 portrait;margin:14mm}