/* FAID-EBS annotation platform — a calm, dense research tool.
   Layout: article (left) · questions/MCQ (middle) · evaluator (right). */

:root{
  --bg:#f4f5f7; --panel:#ffffff; --ink:#16191d; --ink-2:#4a5158; --ink-3:#7a828b;
  --line:#e3e6ea; --line-2:#eef0f3;
  --accent:#0f5c9c; --accent-ink:#ffffff; --accent-soft:#e8f1f9; --accent-line:#bcd8ef;
  --good:#127a4b; --good-soft:#e6f4ed;
  --warn:#8a5a00; --warn-soft:#fdf3e0; --warn-line:#f0dcb4;
  --shadow:0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.04);
  --shadow-lg:0 12px 40px rgba(16,24,40,.16);
  --r:10px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --art-size:15.5px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#111417; --panel:#181c20; --ink:#e9edf1; --ink-2:#aab3bc; --ink-3:#7d868f;
    --line:#282e34; --line-2:#20252a;
    --accent:#4a9fe0; --accent-ink:#0b1116; --accent-soft:#16283a; --accent-line:#2b4a68;
    --good:#59c495; --good-soft:#12291f;
    --warn:#e0b464; --warn-soft:#2a2114; --warn-line:#463c1b;
    --shadow:0 1px 2px rgba(0,0,0,.4); --shadow-lg:0 12px 40px rgba(0,0,0,.55);
  }
}

*{box-sizing:border-box}
/* class-based display rules below would otherwise beat the UA's [hidden] rule */
[hidden]{display:none !important}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--ink); font-family:var(--font);
  font-size:14px; line-height:1.5; -webkit-font-smoothing:antialiased;
}
h1,h2,h3{margin:0; font-weight:650; letter-spacing:-.01em}
button,input,select,textarea{font:inherit; color:inherit}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace; font-size:.92em;
  background:var(--line-2); padding:1px 5px; border-radius:4px}
kbd{font:600 10px/1 var(--font); background:rgba(255,255,255,.22); border-radius:4px;
  padding:3px 5px; margin-left:6px; vertical-align:middle}

/* ───────────────────────────── buttons ───────────────────────────── */
.btn{
  border:1px solid var(--line); background:var(--panel); color:var(--ink);
  padding:7px 13px; border-radius:8px; cursor:pointer; font-weight:550;
  transition:background .12s, border-color .12s, transform .06s; white-space:nowrap;
}
.btn:hover{background:var(--line-2)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent); border-color:var(--accent); color:var(--accent-ink)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent}
.btn.lg{padding:11px 20px; font-size:14.5px; border-radius:9px}
.btn.sm{padding:5px 10px; font-size:12.5px}
.btn.xs{padding:3px 7px; font-size:11.5px; font-weight:600}
.btn.block{display:block; width:100%; text-align:center}
.btn:disabled{opacity:.5; cursor:not-allowed}

.dot{width:9px; height:9px; border-radius:50%; background:var(--accent); flex:none;
  box-shadow:0 0 0 3px var(--accent-soft)}

/* ───────────────────────────── sign-in / gates ───────────────────────────── */
.gate{
  position:fixed; inset:0; z-index:60; display:grid; place-items:center; padding:24px;
  background:var(--bg); overflow:auto;
}
.gate-card{
  width:min(520px,100%); background:var(--panel); border:1px solid var(--line);
  border-radius:14px; padding:28px; box-shadow:var(--shadow-lg);
}
.gate-card.center{text-align:center}
.gate-brand{display:flex; gap:12px; align-items:flex-start; margin-bottom:18px}
.gate-brand h1{font-size:19px}
.gate-brand p{margin:3px 0 0; color:var(--ink-3); font-size:12.5px}
.gate-intro{color:var(--ink-2); margin:0 0 20px; font-size:13.5px}
.gate-note{
  background:var(--warn-soft); border:1px solid var(--warn-line); color:var(--warn);
  padding:11px 13px; border-radius:9px; font-size:12.5px; margin:16px 0 20px;
}
.gate-note code{background:rgba(0,0,0,.06)}
.gate-err{color:#b3261e; font-size:13px; margin:12px 0 0; text-align:center}
.fld{display:block; margin-bottom:15px}
.fld > span{display:block; font-weight:600; font-size:12.5px; margin-bottom:6px}
.fld > span em{font-weight:400; color:var(--ink-3); font-style:normal}
.fld input,.fld select,.fld textarea{
  width:100%; padding:9px 11px; border:1px solid var(--line); border-radius:8px;
  background:var(--bg); outline:none; transition:border-color .12s, box-shadow .12s;
}
.fld input:focus,.fld select:focus,.fld textarea:focus{
  border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft)
}
.tick{
  width:54px; height:54px; margin:0 auto 16px; border-radius:50%;
  background:var(--good-soft); color:var(--good); display:grid; place-items:center; font-size:26px;
}

/* ───────────────────────────── top bar ───────────────────────────── */
.topbar{
  height:50px; display:flex; align-items:center; gap:16px; padding:0 16px;
  background:var(--panel); border-bottom:1px solid var(--line); position:sticky; top:0; z-index:30;
}
.brand{display:flex; align-items:center; gap:9px; font-weight:700; letter-spacing:-.02em}
.brand em{font-style:normal; font-weight:450; color:var(--ink-3)}
.topbar-mid{display:flex; align-items:center; gap:8px; flex:1; min-width:0}
.topbar-right{display:flex; gap:8px}
.crumb{color:var(--ink-3); font-size:12.5px; white-space:nowrap}
.crumb:not(:last-child)::after{content:"·"; margin-left:8px; opacity:.5}
.badge{font-size:11px; font-weight:650; padding:3px 8px; border-radius:999px; white-space:nowrap}
.badge.kappa{background:var(--warn-soft); color:var(--warn); border:1px solid var(--warn-line)}

/* ───────────────────────────── 3-column layout ───────────────────────────── */
.grid{
  display:grid; gap:14px; padding:14px; align-items:start;
  grid-template-columns:minmax(340px,1.05fr) minmax(430px,1.2fr) 286px;
  height:calc(100vh - 50px);
}
.panel{
  background:var(--panel); border:1px solid var(--line); border-radius:var(--r);
  box-shadow:var(--shadow); display:flex; flex-direction:column; height:100%; min-height:0;
  overflow:hidden;
}
.panel-head{
  display:flex; align-items:center; gap:10px; justify-content:space-between;
  padding:11px 14px; border-bottom:1px solid var(--line-2); flex:none;
}
.panel-head h2{font-size:13px; text-transform:uppercase; letter-spacing:.07em; color:var(--ink-3)}
.panel-body{overflow-y:auto; padding:16px 18px; flex:1; min-height:0; scroll-behavior:smooth}

/* ── article panel ── */
.art-tools{display:flex; gap:6px; align-items:center}
.art-tools input{
  width:150px; padding:5px 9px; border:1px solid var(--line); border-radius:7px;
  background:var(--bg); outline:none; font-size:12.5px;
}
.art-tools input:focus{border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft)}
.art-title{font-size:18px; line-height:1.32; margin-bottom:10px; font-family:var(--serif)}
.chips{display:flex; flex-wrap:wrap; gap:6px; margin-bottom:16px}
.chip{
  font-size:11.5px; padding:3px 9px; border-radius:999px; background:var(--line-2);
  color:var(--ink-2); border:1px solid var(--line);
}
.art-text{
  font-family:var(--serif); font-size:var(--art-size); line-height:1.68; color:var(--ink);
  white-space:pre-wrap; word-wrap:break-word;
}
.art-text mark{background:#ffe57f; color:#000; border-radius:2px; padding:0 1px}
.art-text mark.on{background:#ff9800; color:#fff}
.art-end{text-align:center; color:var(--ink-3); font-size:11.5px; margin:26px 0 8px; letter-spacing:.04em}

/* ── question panel ── */
.secnav{display:flex; gap:4px; flex-wrap:wrap; justify-content:flex-end}
.secnav button{
  border:1px solid var(--line); background:transparent; color:var(--ink-3); cursor:pointer;
  font-size:11px; font-weight:600; padding:3px 8px; border-radius:999px;
}
.secnav button:hover{background:var(--line-2); color:var(--ink)}
.secnav button b{color:var(--accent); margin-left:4px}

.rulecard{
  background:var(--accent-soft); border:1px solid var(--accent-line); color:var(--ink-2);
  border-radius:9px; padding:11px 13px; font-size:12.5px; margin-bottom:16px;
}
.rulecard strong{color:var(--ink)}
.pill-demo{
  display:inline-block; background:var(--panel); border:1px solid var(--line);
  border-radius:999px; padding:1px 8px; font-size:11.5px; font-weight:600;
}

.section-h{
  display:flex; align-items:baseline; gap:9px; margin:24px 0 10px;
  padding-bottom:7px; border-bottom:1px solid var(--line-2);
}
.section-h:first-child{margin-top:0}
.section-h h3{font-size:14px}
.section-h span{font-size:11.5px; color:var(--ink-3)}

.qcard{padding:13px 0; border-bottom:1px dashed var(--line-2)}
.qcard:last-child{border-bottom:0}
.qcard.notes{border:1px solid var(--line); border-radius:9px; padding:14px; margin-top:22px}
.qcard.notes .fld{margin:0}
.q-label{font-weight:600; font-size:13.5px; margin-bottom:2px}
.q-label .num{color:var(--ink-3); font-weight:500; margin-right:7px; font-variant-numeric:tabular-nums}
.q-hint{color:var(--ink-3); font-size:12px; margin-bottom:8px}

/* MCQ pills */
.opts{display:flex; flex-wrap:wrap; gap:6px}
.opt{
  display:inline-flex; align-items:center; gap:6px; cursor:pointer; user-select:none;
  border:1px solid var(--line); background:var(--bg); border-radius:999px;
  padding:5px 12px; font-size:12.5px; font-weight:550; color:var(--ink-2);
  transition:all .11s;
}
.opt:hover{border-color:var(--accent-line); background:var(--accent-soft)}
.opt:focus-visible{outline:2px solid var(--accent); outline-offset:2px}
.opt.sel{background:var(--accent); border-color:var(--accent); color:var(--accent-ink)}
.opt-hint{align-self:center; font-size:11.5px; color:var(--ink-3); margin-left:2px}
.opt.none{color:var(--ink-3)}
.opt.none.sel{background:var(--ink-3); border-color:var(--ink-3); color:var(--panel)}
.opt.wide{border-radius:9px; align-items:flex-start; text-align:left; padding:9px 13px; flex:1 1 100%}
.opt.wide small{display:block; font-weight:450; opacity:.8; margin-top:2px; font-size:11.5px}

.q-in{
  width:100%; padding:8px 11px; border:1px solid var(--line); border-radius:8px;
  background:var(--bg); outline:none; transition:border-color .12s, box-shadow .12s;
}
.q-in:focus{border-color:var(--accent); box-shadow:0 0 0 3px var(--accent-soft)}
.q-in.filled{border-color:var(--accent-line); background:var(--panel)}
.q-free{font-size:11.5px; color:var(--ink-3); margin-top:5px}
.q-row{display:flex; gap:8px; align-items:center}
.q-row .q-in{flex:1}
.q-clear{
  border:0; background:transparent; color:var(--ink-3); cursor:pointer; font-size:12px;
  padding:6px 8px; border-radius:6px;
}
.q-clear:hover{background:var(--line-2); color:var(--ink)}
.en-tag{
  font-size:10.5px; font-weight:700; color:var(--accent); background:var(--accent-soft);
  border:1px solid var(--accent-line); border-radius:4px; padding:1px 5px; margin-left:7px;
  letter-spacing:.03em; vertical-align:middle;
}

.submit-row{display:flex; gap:10px; justify-content:space-between; align-items:center;
  margin:26px 0 10px; padding-top:18px; border-top:1px solid var(--line-2)}
.submit-row.center{justify-content:center; border:0; margin-bottom:0}

/* ── evaluator rail ── */
.rail{padding:16px; gap:16px; overflow-y:auto}
.who{display:flex; gap:11px; align-items:center}
.avatar{
  width:42px; height:42px; border-radius:50%; flex:none; display:grid; place-items:center;
  background:var(--accent); color:var(--accent-ink); font-weight:700; font-size:15px;
  letter-spacing:.02em;
}
.who-txt{min-width:0}
.who-txt strong{display:block; font-size:14px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.who-txt span{color:var(--ink-3); font-size:12px}

.prog-top{display:flex; justify-content:space-between; align-items:baseline; font-size:12.5px;
  color:var(--ink-2); margin-bottom:7px}
.prog-top b{font-size:20px; color:var(--ink); font-variant-numeric:tabular-nums}
.bar{height:7px; background:var(--line-2); border-radius:999px; overflow:hidden}
.bar i{display:block; height:100%; width:0; background:var(--accent); border-radius:999px;
  transition:width .35s ease}
.prog-sub{font-size:11.5px; color:var(--ink-3); margin-top:7px}

.stats{margin:0; display:grid; gap:1px; background:var(--line-2); border:1px solid var(--line-2);
  border-radius:9px; overflow:hidden}
.stats > div{display:flex; justify-content:space-between; align-items:baseline;
  background:var(--panel); padding:8px 11px}
.stats dt{color:var(--ink-3); font-size:12px}
.stats dd{margin:0; font-weight:650; font-size:13px; font-variant-numeric:tabular-nums}

.save{display:flex; align-items:center; gap:8px; font-size:12px; color:var(--ink-3)}
.save i{width:7px; height:7px; border-radius:50%; background:var(--good); flex:none}
.save.saving i{background:var(--warn)}
.save.err i{background:#b3261e}

.rail-actions{display:grid; gap:8px}
.rail-foot{font-size:11px; color:var(--ink-3); margin:auto 0 0; line-height:1.5}

/* ───────────────────────────── drawer + toast ───────────────────────────── */
.drawer{position:fixed; inset:0; z-index:70; background:rgba(16,24,40,.42);
  display:grid; place-items:center; padding:24px}
.drawer-card{width:min(720px,100%); max-height:82vh; background:var(--panel);
  border:1px solid var(--line); border-radius:14px; box-shadow:var(--shadow-lg);
  display:flex; flex-direction:column; overflow:hidden}
.drawer-head{display:flex; align-items:center; justify-content:space-between;
  padding:15px 18px; border-bottom:1px solid var(--line-2)}
.drawer-head h2{font-size:15px}
.drawer-body{overflow-y:auto; padding:18px}
.drawer-body h4{margin:18px 0 6px; font-size:13px}
.drawer-body h4:first-child{margin-top:0}
.drawer-body p,.drawer-body li{color:var(--ink-2); font-size:13px; margin:6px 0}
.drawer-body ul{padding-left:18px; margin:6px 0}
.wtable{width:100%; border-collapse:collapse; font-size:12.5px}
.wtable th,.wtable td{text-align:left; padding:7px 9px; border-bottom:1px solid var(--line-2)}
.wtable th{color:var(--ink-3); font-weight:600; font-size:11.5px; text-transform:uppercase;
  letter-spacing:.05em}
.wtable button{font-size:12px}
.wtable tr:hover td{background:var(--line-2)}

.toast{
  position:fixed; bottom:22px; left:50%; transform:translateX(-50%); z-index:80;
  background:var(--ink); color:var(--bg); padding:10px 18px; border-radius:999px;
  font-size:13px; font-weight:550; box-shadow:var(--shadow-lg);
}

/* ───────────────────────────── responsive ───────────────────────────── */
@media (max-width:1240px){
  .grid{grid-template-columns:1fr 1fr; grid-template-rows:auto auto;
    height:auto; min-height:calc(100vh - 50px)}
  .panel.rail{grid-column:1/-1; flex-direction:row; flex-wrap:wrap; align-items:center;
    height:auto; gap:20px}
  .rail .prog{flex:1; min-width:200px}
  .rail .stats{flex:2; grid-template-columns:repeat(4,1fr); min-width:320px}
  .rail-actions{display:flex; gap:8px}
  .rail-foot{display:none}
  .panel.article,.panel.form{height:calc(100vh - 190px)}
}
@media (max-width:900px){
  .grid{grid-template-columns:1fr}
  .panel.article,.panel.form{height:auto; max-height:none}
  .panel-body{overflow:visible}
  .rail{flex-direction:column; align-items:stretch}
  .rail .stats{grid-template-columns:1fr 1fr}
  .topbar-mid{display:none}
}