:root {
  --bg: #eef1f6;
  --panel: #ffffff;
  --border: #e2e6ee;
  --ink: #1b2330;
  --muted: #71808f;
  --accent: #4f46e5;
  --accent-soft: #eef0fe;
  --yes: #15a34a;
  --yes-soft: #e7f7ec;
  --no: #e0322f;
  --no-soft: #fdebea;
  --viewer-bg: #070a0f;
  --shadow: 0 1px 3px rgba(16,24,40,.06), 0 1px 2px rgba(16,24,40,.04);
}

* { box-sizing: border-box; scrollbar-width: none; }
*::-webkit-scrollbar { display: none; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink); background: var(--bg);
  display: flex; flex-direction: column; height: 100vh; overflow: hidden;
  font-size: 14px;
}
button { font-family: inherit; }

/* ---------- Topbar ---------- */
#topbar {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px;
  padding: 0 20px; height: 64px; flex: 0 0 auto;
  background: var(--panel); border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
}
.brand { font-weight: 700; font-size: 16px; letter-spacing: -.01em; justify-self: start; }
.brand .sub { font-weight: 500; color: var(--accent); font-size: 13px; margin-left: 8px; }
#dstoggle { justify-self: end; }

.reviewer {
  justify-self: center; display: flex; align-items: center; gap: 10px;
  background: var(--accent-soft); border: 1.5px solid #c7d2fe;
  border-radius: 10px; padding: 6px 14px; cursor: text;
}
.reviewer-label { font-size: 13px; font-weight: 600; color: var(--accent); white-space: nowrap; }
.reviewer input {
  padding: 5px 10px; border: 1.5px solid #c7d2fe; border-radius: 7px;
  font-size: 15px; font-weight: 500; width: 200px; background: #fff; color: var(--ink);
}
.reviewer input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,70,229,.12); }

/* dataset toggle */
.seg-toggle { display: inline-flex; background: #f0f2f7; border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.seg-toggle button {
  border: none; background: transparent; color: var(--muted); font-weight: 600; font-size: 13px;
  padding: 6px 16px; border-radius: 7px; cursor: pointer; transition: .12s;
}
.seg-toggle button.active { background: var(--accent); color: #fff; box-shadow: var(--shadow); }

/* ---------- Layout 3 cột + drag handles ---------- */
#layout {
  flex: 1 1 auto; display: grid;
  grid-template-columns: 240px 4px 1fr 4px 520px;
  min-height: 0;
}
#caselist { background: var(--panel); overflow-y: auto; min-width: 140px; }
#main { overflow-y: auto; padding: 18px 22px 60px; min-height: 0; min-width: 280px; }
#side { background: var(--panel); overflow-y: auto; min-height: 0; min-width: 360px; }

.drag-handle {
  width: 4px; cursor: col-resize;
  background: var(--border);
  transition: background .15s;
  position: relative; z-index: 5;
}
.drag-handle:hover, .drag-handle.dragging { background: var(--accent); }
/* vùng bắt chuột rộng hơn thanh nhìn thấy */
.drag-handle::after {
  content: ''; position: absolute;
  top: 0; bottom: 0; left: -4px; right: -4px;
  cursor: col-resize;
}

/* ---------- Cột trái: danh sách ca ---------- */
.searchrow { padding: 10px; position: sticky; top: 0; background: var(--panel); border-bottom: 1px solid var(--border); z-index: 1; }
.searchrow input { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.list-count { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); padding: 12px 14px 4px; font-weight: 700; }
.case-item {
  padding: 10px 14px; cursor: pointer; border-bottom: 1px solid #f1f3f7;
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
}
.case-item:hover { background: #f7f8fc; }
.case-item.active { background: var(--accent-soft); box-shadow: inset 3px 0 0 var(--accent); }
.case-item .cid { font-family: ui-monospace, "SF Mono", monospace; font-size: 13px; font-weight: 600; }
.case-item .n { font-size: 11px; color: var(--muted); background: #f0f2f7; border-radius: 10px; padding: 2px 8px; }
.reviewed-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--yes); display: inline-block; margin-left: 6px; }

/* ---------- Cột giữa: VQA ---------- */
#caseinfo { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; box-shadow: var(--shadow); margin-bottom: 16px; }
#caseinfo.empty { color: var(--muted); text-align: center; padding: 40px; }
.ci-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.ci-head h2 { margin: 0; font-size: 18px; font-family: ui-monospace, monospace; }
.ci-demo { color: var(--muted); font-size: 13px; }
.ci-progress { margin-left: auto; font-size: 12px; color: var(--muted); }
.ci-progress b { color: var(--yes); }

.qa-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px 18px; margin-bottom: 14px; box-shadow: var(--shadow); transition: border-color .15s;
}
.qa-card.done { border-color: var(--yes); border-left: 4px solid var(--yes); }
.qa-top { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.qnum { font-size: 12px; font-weight: 700; color: var(--muted); }
.qa-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-size: 11px; padding: 2px 9px; border-radius: 20px; background: #f0f2f7; color: var(--muted); font-weight: 600; }
.chip.cat { background: var(--accent-soft); color: var(--accent); }
.chip.yesno { background: #fff4d6; color: #92580e; }
.chip.open { background: #dce9ff; color: #1d4ed8; }
.rec-badge { margin-left: auto; font-size: 12px; color: var(--yes); font-weight: 600; display: none; }
.qa-card.done .rec-badge { display: inline; }

.qa-question { font-size: 15px; font-weight: 600; line-height: 1.5; margin-bottom: 10px; }
.qa-answer {
  background: #f7f8fc; border: 1px solid var(--border); border-radius: 9px;
  padding: 10px 12px; font-size: 14px; line-height: 1.45; margin-bottom: 8px;
}
.qa-answer .alabel { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--accent); margin-right: 8px; }
.qa-prov { font-size: 12px; color: var(--muted); font-style: italic; line-height: 1.4; margin-bottom: 12px; padding-left: 10px; border-left: 2px solid var(--border); }

/* review tối giản */
.qa-review { border-top: 1px dashed var(--border); padding-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.rev-item { display: flex; align-items: center; gap: 12px; }
.rev-item > .lbl { font-size: 13px; font-weight: 500; width: 130px; }
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg button { border: none; background: #fff; padding: 6px 18px; cursor: pointer; font-size: 13px; color: var(--muted); font-weight: 600; transition: .1s; }
.seg button + button { border-left: 1px solid var(--border); }
.seg button:hover { background: #f7f8fc; }
.seg button.sel-yes { background: var(--yes); color: #fff; }
.seg button.sel-no { background: var(--no); color: #fff; }
.note { width: 100%; padding: 8px 11px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; font-family: inherit; }
.note:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.rev-actions { display: flex; align-items: center; gap: 12px; }
.btn { padding: 8px 18px; border-radius: 8px; border: 1px solid var(--border); background: #fff; cursor: pointer; font-size: 13px; font-weight: 600; }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.primary:hover { background: #4338ca; }
.status { font-size: 12px; color: var(--yes); font-weight: 600; }
.status.err { color: var(--no); }

/* ---------- Cột phải: CT + báo cáo ---------- */
.viewer-card { position: sticky; top: 0; background: var(--viewer-bg); z-index: 1; }
#viewerctrl { display: flex; flex-wrap: wrap; gap: 12px; padding: 8px 10px; background: #0e131b; border-bottom: 1px solid #1c2430; }
.grp { display: inline-flex; gap: 3px; }
#viewerctrl button { background: #19212c; color: #c4cdd9; border: 1px solid #2a3543; padding: 5px 11px; border-radius: 7px; cursor: pointer; font-size: 12px; font-weight: 600; }
#viewerctrl button:hover { background: #232e3c; }
#viewerctrl button.active { background: var(--accent); color: #fff; border-color: var(--accent); }
#canvaswrap { position: relative; height: 440px; background: var(--viewer-bg); }
#gl { width: 100%; height: 100%; display: block; }
#viewerhint, #loading { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); color: #5b6675; font-size: 12px; pointer-events: none; text-align: center; }
#loading { color: #dce3ec; background: rgba(0,0,0,.55); padding: 9px 16px; border-radius: 8px; }

.report-card { padding: 14px 16px; font-size: 13px; line-height: 1.55; }
.report-card.empty { color: var(--muted); }
.report-card .rlabel { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin-top: 12px; margin-bottom: 3px; }
.report-card .rlabel:first-child { margin-top: 0; }
.report-card p { margin: 0 0 6px; }

/* responsive: thu hẹp */
@media (max-width: 1100px) {
  #layout { grid-template-columns: 200px 1fr 420px; }
}