/* FER Loadsheet Builder - the prototype's design (FER_prototype_2026-09-18_v2.html), served from 'self' only. */
:root{
  --ground:#F2F1EC; --surface:#FFFFFF; --line:#D9D6CC; --line2:#EEECE5; --soft:#F7F6F2;
  --ink:#1B1E21; --mute:#545A60; --dim:#6B7176;
  --accent:#245A7A; --accent-bg:#E3ECF1; --accent-line:#B7CEDB;
  --ok:#2E6B45; --ok-bg:#E4EFE7; --warn:#7A5000; --warn-bg:#F6ECD6;
  --bad:#A12F28; --bad-bg:#F6E1DF; --purple:#5A4A8C; --purple-bg:#ECE8F5;
  --on-accent:#fff;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ground:#16181A; --surface:#1F2225; --line:#33383D; --line2:#2A2E32; --soft:#25292D;
    --ink:#ECEDEE; --mute:#A8AEB3; --dim:#8F969B;
    --accent:#7FB3D0; --accent-bg:#1E3440; --accent-line:#33556A;
    --ok:#7FC49A; --ok-bg:#1D3126; --warn:#E0B463; --warn-bg:#352B17;
    --bad:#E8897F; --bad-bg:#3A1F1D; --purple:#B4A6E0; --purple-bg:#2A2340; --on-accent:#0F1113;
  }
}
:root[data-theme="dark"]{
  --ground:#16181A; --surface:#1F2225; --line:#33383D; --line2:#2A2E32; --soft:#25292D;
  --ink:#ECEDEE; --mute:#A8AEB3; --dim:#8F969B;
  --accent:#7FB3D0; --accent-bg:#1E3440; --accent-line:#33556A;
  --ok:#7FC49A; --ok-bg:#1D3126; --warn:#E0B463; --warn-bg:#352B17;
  --bad:#E8897F; --bad-bg:#3A1F1D; --purple:#B4A6E0; --purple-bg:#2A2340; --on-accent:#0F1113;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--ink);font-family:"IBM Plex Sans","Segoe UI",system-ui,-apple-system,sans-serif;font-size:15px;line-height:1.45}
.mono,code,pre{font-family:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace}
code{font-size:13px}
a{color:var(--accent)}
button{font-family:inherit;font-size:14px;color:inherit}
select,input,textarea{font-family:inherit;font-size:14px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:9px 11px;max-width:100%}
textarea{width:100%;min-height:70px}
select:focus,input:focus,textarea:focus,button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
input[type="checkbox"],input[type="radio"]{accent-color:var(--accent);width:16px;height:16px;padding:0}
input[type="file"]{padding:7px}
input::placeholder{color:var(--dim)}
label{font-size:13px;color:var(--mute)}
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}
.field input,.field select,.field textarea{width:100%}

.topbar{background:#1B1E21;color:#F2F1EC;display:flex;align-items:center;gap:18px;padding:8px 20px;flex-wrap:wrap}
:root[data-theme="dark"] .topbar{background:#0F1113}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .topbar{background:#0F1113}}
.brand{font-weight:700;color:#F2F1EC;text-decoration:none}.brand span{font-weight:400;color:#B9BEC2}
.nav{display:flex;gap:2px;flex-wrap:wrap;flex-grow:1}
.nav a{color:#C9CDD0;padding:9px 12px;border-radius:6px;text-decoration:none;min-height:40px;display:inline-flex;align-items:center}
.nav a:hover{background:#2A2E32;color:#fff}
.nav a[aria-current="page"]{background:#33383D;color:#fff;font-weight:600}
.topbar .who{color:#C9CDD0;font-size:13px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.topbar .who a{color:#C9CDD0}
.topbar select{background:#2A2E32;color:#F2F1EC;border-color:#44494F;padding:6px 10px}
.linkbtn{background:none;border:0;color:inherit;text-decoration:underline;cursor:pointer;padding:4px}
.themebtn{background:#2A2E32;border:1px solid #44494F;color:#F2F1EC;border-radius:6px;padding:6px 10px;cursor:pointer}

.wrap{max-width:1400px;margin:0 auto;padding:20px}
.crumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:14px;margin-bottom:14px;color:var(--dim)}
.crumbs a{color:var(--accent)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px}
.pad{padding:16px}
.mt{margin-top:16px}.mb{margin-bottom:16px}.mt0{margin-top:0}
h1{font-size:26px;margin:0 0 4px}
h2{font-size:17px;margin:0 0 10px}
h3{font-size:15px;margin:0 0 8px}
.muted{color:var(--mute);font-size:13px}
.small{font-size:12px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.row.top{align-items:flex-start}
.grow{flex-grow:1}
.right{margin-left:auto}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.p-ok{color:var(--ok);background:var(--ok-bg)}.p-warn{color:var(--warn);background:var(--warn-bg)}
.p-bad{color:var(--bad);background:var(--bad-bg)}.p-acc{color:var(--accent);background:var(--accent-bg)}
.p-mute{color:var(--mute);background:var(--soft)}.p-pur{color:var(--purple);background:var(--purple-bg)}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:8px 14px;min-height:38px;display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--ink);font-size:14px}
.chip[aria-pressed="true"]{background:var(--ink);color:var(--ground);border-color:var(--ink);font-weight:600}
.btn{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:9px 16px;min-height:42px;cursor:pointer;text-decoration:none;color:var(--ink);display:inline-flex;align-items:center;gap:6px;font-size:14px}
.btn:hover{border-color:var(--accent)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent);font-weight:600}
.btn-danger{background:var(--bad);border-color:var(--bad);color:#fff;font-weight:700}
.btn-small{min-height:32px;padding:5px 10px;font-size:13px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed}
.inline{display:inline}
table{width:100%;border-collapse:collapse}
th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--mute);padding:10px 12px;background:var(--soft);white-space:nowrap}
td{padding:10px 12px;border-top:1px solid var(--line2);vertical-align:top}
tr:hover td{background:var(--soft)}
.num{text-align:right;font-variant-numeric:tabular-nums}
.scroll{overflow-x:auto}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.stat b{display:block;font-size:24px;font-variant-numeric:tabular-nums}
.stat span{color:var(--mute);font-size:13px}
.kv{display:grid;grid-template-columns:minmax(120px,190px) 1fr;gap:6px 14px;font-size:14px}
.kv dt{color:var(--mute)}.kv dd{margin:0;word-break:break-word}
.note{font-family:"IBM Plex Mono",monospace;font-size:13px;background:var(--soft);border:1px solid var(--line2);border-radius:8px;padding:10px 12px;white-space:pre-wrap;word-break:break-word}
pre.log{max-height:560px;overflow:auto;margin:0}
.flash{padding:12px 14px;border-radius:10px;margin-bottom:12px;border:1px solid var(--line)}
.flash.ok{background:var(--ok-bg);color:var(--ok)}.flash.bad{background:var(--bad-bg);color:var(--bad)}
.flash.warn{background:var(--warn-bg);color:var(--warn)}
.list{margin:0;padding-left:18px}.list li{margin:3px 0}
meter{width:100px;height:10px}
.side{border-left:4px solid var(--accent);padding-left:12px}
.stripe{height:8px;background:repeating-linear-gradient(-45deg,var(--bad) 0,var(--bad) 10px,var(--bad-bg) 10px,var(--bad-bg) 20px);border-radius:12px 12px 0 0}

/* review */
.item{scroll-margin-top:16px}
.item.answered{opacity:.92}
.item header{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:8px}
.opts{display:grid;gap:8px;margin:10px 0}
.opt{display:flex;gap:10px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;cursor:pointer;align-items:flex-start}
.opt:hover{border-color:var(--accent)}
.opt input{margin-top:3px;flex:none}
.opt:has(input:checked){border:2px solid var(--accent);background:var(--accent-bg)}
.opt .ev{color:var(--mute);font-size:13px;display:block;margin-top:2px;word-break:break-word}
.opt input[type="text"]{width:100%;margin-top:6px}
.ctx{display:grid;gap:8px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));margin-top:8px}
.ctx div{background:var(--soft);border:1px solid var(--line2);border-radius:8px;padding:8px 10px;font-size:13px;word-break:break-word}
.ctx b{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--mute);margin-bottom:2px}
details summary{cursor:pointer;color:var(--accent)}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.thumbs a{display:block;border:1px solid var(--line);border-radius:8px;overflow:hidden;text-decoration:none;color:var(--mute);font-size:12px}
.thumbs img{width:100%;height:120px;object-fit:cover;display:block;background:var(--soft)}
.thumbs span{display:block;padding:4px 6px}

/* sign-in */
.auth{max-width:420px;margin:8vh auto;padding:0 16px}
.auth .card{padding:24px}
.auth h1{font-size:22px}
.auth .btn{width:100%;justify-content:center}

@media (max-width:760px){
  .wrap{padding:12px}
  h1{font-size:22px}
  .topbar{padding:8px 12px;gap:8px}
  .kv{grid-template-columns:1fr}
  .hide-sm{display:none}
}