/* Нарны тооцоолуур — инженерийн техникийн хуудасны хэв маяг: цагаан гадаргуу, цэнхэр-хар үндсэн өнгө,
   нарны шар зөвхөн нарны үйлдвэрлэлийн өгөгдөлд. Нэг үсгийн гэр бүл (IBM Plex Sans), өгүүлбэрийн том үсэг. */
:root{
  color-scheme:light;
  --page:#F3F5F7; --surface:#FFFFFF; --ink:#16222E; --muted:#5F6B76; --rule:#D9DFE4; --soft:#EEF1F4;
  --navy:#004078; --navy-ink:#FFFFFF; --navy-soft:#E7EEF5;
  --solar:#E8A317; --good:#2E7D4F; --good-soft:#E8F3EC; --warn:#A35A00; --warn-soft:#FBF1E3;
  --c-pv:#E8A317; --c-base:#7D8FA3; --c-heat:#C2552D; --c-bk:#7E2E17;
  --f:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--page);color:var(--ink);font:400 15px/1.55 var(--f)}
[hidden]{display:none!important}
.in{max-width:1160px;margin:0 auto;padding-inline:16px}
h1,h2,h3{margin:0;font-weight:600;text-wrap:balance;letter-spacing:-.01em}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--navy);outline-offset:2px}
a{color:var(--navy)}

/* ---- толгой ---- */
.top{background:var(--surface);border-bottom:1px solid var(--rule);position:sticky;top:env(safe-area-inset-top,0px);z-index:5}
.top .in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:60px}
.brand{text-decoration:none;color:var(--ink);min-width:0;display:block;line-height:1.25}
.brand b{display:block;font-weight:600;font-size:16px;letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand small{display:block;color:var(--muted);font-size:12.5px}
.brandrow{display:flex;align-items:center;gap:14px;min-width:0}
.foxlogo{height:30px;width:auto;flex:none;padding-left:14px;border-left:1px solid var(--rule)}
@media (max-width:520px){.foxlogo{height:24px;padding-left:10px}.brandrow{gap:10px}}
nav{display:flex;gap:16px;align-items:center;flex:none}
nav a{text-decoration:none;font-size:14px;font-weight:500}
.call{color:var(--ink)}
.call::before{content:"Утас ";color:var(--muted);font-weight:400}
.login{border:1px solid var(--navy);color:var(--navy);border-radius:6px;padding:7px 14px}
.login:hover{background:var(--navy);color:var(--navy-ink)}
@media (max-width:520px){nav{gap:10px}.call::before{content:""}.brand small{display:none}.login{padding:6px 10px}}

/* ---- гарчиг, таб ---- */
.hero{padding:32px 0 0}
.hero h1{font-size:clamp(24px,3.6vw,32px);line-height:1.2;max-width:26ch}
.hero p{color:var(--muted);margin:8px 0 22px;max-width:64ch}
.tabs{display:flex;gap:28px;border-bottom:1px solid var(--rule);margin-bottom:24px;overflow-x:auto}
.tabs button{background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-1px;padding:10px 0 12px;font-weight:500;font-size:15.5px;color:var(--muted);cursor:pointer;white-space:nowrap}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--navy);font-weight:600}
.tabs .ic{display:none}

/* ---- байршил ---- */
.layout{display:grid;grid-template-columns:360px minmax(0,1fr);gap:24px;align-items:start;padding-bottom:48px}
@media (max-width:900px){.layout{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border:1px solid var(--rule);border-radius:10px;padding:20px;min-width:0}
.form{position:sticky;top:80px;display:flex;flex-direction:column;gap:18px}
@media (max-width:900px){.form{position:static}}

/* ---- маягт ---- */
fieldset{border:0;margin:0 0 18px;padding:0;min-width:0}
legend,.form label{font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:8px;padding:0}
.form label{display:flex;flex-direction:column;gap:6px;margin:0 0 14px}
.form label.check{flex-direction:row;align-items:center;gap:8px;font-weight:400}
.form label.check input{width:16px;height:16px;accent-color:var(--navy)}
.form label.inline{flex-direction:row;align-items:center;gap:8px;flex-wrap:wrap;margin-top:10px;font-weight:400}
.form label.inline input{width:90px}
input[type=number],select,.leadf input,textarea{width:100%;min-width:0;background:var(--surface);border:1px solid var(--rule);border-radius:6px;padding:9px 11px;font-size:15px}
input[type=number]:hover,select:hover{border-color:#B7C1CA}
.big{display:flex;align-items:baseline;gap:8px;border:1px solid var(--rule);border-radius:6px;padding:4px 12px;margin-top:8px;background:var(--surface)}
.big:focus-within{border-color:var(--navy);box-shadow:0 0 0 1px var(--navy)}
.big input{border:0;padding:6px 0;font-size:22px;font-weight:600;width:100%;min-width:0;font-variant-numeric:tabular-nums;background:transparent}
.big input:focus-visible{outline:0}
.big span{color:var(--muted);white-space:nowrap;font-size:13.5px}
.range{width:100%;accent-color:var(--navy);margin:12px 0 0}
.unit{display:flex;align-items:center;gap:8px}
.unit i{font-style:normal;color:var(--muted);font-size:13px;white-space:nowrap;font-weight:400}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;border:1px solid var(--rule);border-radius:6px;overflow:hidden}
.seg button{border:0;border-left:1px solid var(--rule);background:var(--surface);padding:9px 6px;font-size:14px;cursor:pointer;color:var(--ink)}
.seg button:first-child{border-left:0}
.seg button[aria-pressed="true"]{background:var(--navy);color:var(--navy-ink);font-weight:500}
.seg.sm button{font-size:13.5px;padding:7px 4px}
.chips{display:flex;flex-wrap:wrap;align-items:center;gap:4px 14px;margin-bottom:16px;font-size:14px}
.chips::before{content:"Жишээ:";color:var(--muted)}
.chips.sm{margin:10px 0 0}
.chips.sm::before{content:"Түгээмэл:"}
.chips button{border:0;background:none;padding:2px 0;color:var(--navy);cursor:pointer;text-decoration:underline;text-decoration-color:#9FB3C6;text-underline-offset:3px}
.chips button:hover{text-decoration-color:var(--navy)}
.cards{display:grid;gap:0;border:1px solid var(--rule);border-radius:6px;overflow:hidden}
.cards button{display:flex;gap:10px;align-items:center;text-align:left;border:0;border-top:1px solid var(--rule);background:var(--surface);padding:10px 12px;cursor:pointer;font-size:14px;line-height:1.35}
.cards button:first-child{border-top:0}
.cards button b{font-weight:400;font-size:13px;color:var(--muted);margin-left:auto;white-space:nowrap;font-variant-numeric:tabular-nums}
.cards button[aria-pressed="true"]{background:var(--navy-soft);box-shadow:inset 3px 0 0 var(--navy)}
.help{font-size:13px;color:var(--muted);margin:8px 0 0}
details.more{border-top:1px solid var(--rule);padding-top:14px}
details.more summary,details.lw summary{cursor:pointer;font-weight:500;font-size:14px;color:var(--navy)}
details.more[open] summary{margin-bottom:12px}
details.lw{margin-top:10px}
.lwrow{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr) auto minmax(0,1.25fr);gap:6px;align-items:center;margin-top:8px}
.lwrow span{color:var(--muted)}
.lwrow input,.lwrow select{padding:8px}

/* ---- үр дүн ---- */
.res{display:flex;flex-direction:column;gap:16px;min-width:0}
.res.busy .answer,.res.busy #chartCard{opacity:.6;transition:opacity .15s}
.muted{color:var(--muted)}
.answer{padding:24px}
.answer .eyebrow{font-size:14px;color:var(--muted);margin:0 0 6px}
.answer h2{font-size:clamp(22px,3vw,28px);line-height:1.25}
.answer h2 em{font-style:normal}
.answer .lead{margin:10px 0 0;color:var(--ink);max-width:72ch}
.kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);margin-top:20px}
@media (max-width:640px){.kpis{grid-template-columns:repeat(2,minmax(0,1fr))}}
.kpi{padding:14px 14px 14px 0;min-width:0}
.kpi+.kpi{padding-left:14px;border-left:1px solid var(--rule)}
@media (max-width:640px){.kpi:nth-child(3){padding-left:0;border-left:0}.kpi:nth-child(n+3){border-top:1px solid var(--rule)}}
.kpi span{display:block;font-size:13px;color:var(--muted)}
.kpi b{display:block;font-size:22px;font-weight:600;line-height:1.3;margin-top:2px;font-variant-numeric:tabular-nums}
.kpi b small{font-size:14px;font-weight:400;color:var(--muted)}
.kpi i{display:block;font-style:normal;font-size:12.5px;color:var(--muted)}
.kpi.good b{color:var(--good)}
.row3{display:flex;flex-wrap:wrap;gap:6px 24px;margin-top:14px;font-size:14px;color:var(--muted)}
.row3 b{color:var(--ink);font-weight:600;font-variant-numeric:tabular-nums}
.chart{width:100%;overflow:hidden}
.chart svg{display:block;width:100%;height:auto}
.chart svg text{font-family:var(--f)}
.legend{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:var(--muted);margin-top:10px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px;vertical-align:-1px}
#chartCard h3,#extra h3,.cta h3{font-size:16.5px;margin-bottom:12px}
.tbl{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
.tbl th,.tbl td{padding:10px 8px;border-bottom:1px solid var(--rule);text-align:right;white-space:nowrap}
.tbl th:first-child,.tbl td:first-child{text-align:left;white-space:normal;padding-left:0}
.tbl th:last-child,.tbl td:last-child{padding-right:0}
.tbl th{font-size:13px;color:var(--muted);font-weight:500;border-bottom-color:var(--ink)}
.tbl tr.rec td{background:var(--navy-soft);font-weight:600}
.tbl tr.rec td:first-child{padding-left:8px;box-shadow:inset 3px 0 0 var(--navy)}
.tbl tr.rec td:first-child::after{content:"Санал болгох";display:block;font-size:12px;font-weight:500;color:var(--navy)}
.tbl tr.me td:first-child::after{content:" (сонгосон)";color:var(--muted);font-weight:400;font-size:12.5px}
.tbl tr.best td:last-child{color:var(--good);font-weight:600}
.scroll{overflow-x:auto}
.note{border-radius:6px;padding:12px 14px;font-size:14px;margin-top:16px}
.note.warn{background:var(--warn-soft);border-left:3px solid var(--warn)}
.note.good{background:var(--good-soft);border-left:3px solid var(--good)}
.note b{font-weight:600}
.note ul{margin:4px 0 0;padding-left:18px}
.cta{border-top:3px solid var(--navy)}
.cta .muted{margin:0}
.leadf{display:grid;grid-template-columns:1fr 1fr auto;gap:8px;margin-top:14px}
@media (max-width:560px){.leadf{grid-template-columns:1fr}}
.primary{border:0;border-radius:6px;background:var(--navy);color:var(--navy-ink);font-weight:600;padding:10px 20px;cursor:pointer}
.primary:hover{background:#00305C}
.primary:disabled{opacity:.6;cursor:default}
.msg{min-height:1.4em;font-size:14px;margin:8px 0 0}
.msg.ok{color:var(--good)}.msg.err{color:var(--c-heat)}
.fine{font-size:12.5px;color:var(--muted);margin:0;max-width:80ch}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
@media (max-width:520px){.tabs{display:grid;grid-template-columns:1fr 1fr;gap:0}.tabs button{font-size:14.5px;text-align:center;white-space:normal}}
@media (max-width:520px){.brand b{white-space:normal;font-size:13.5px;line-height:1.2}}