:root {
  --ink: #1c2733;
  --muted: #5b6b7b;
  --line: #dde4ec;
  --bg: #f4f6f9;
  --card: #ffffff;
  --accent: #0f5d8f;
  --accent-soft: #e8f1f8;
  --isa-a: #2266aa;
  --isa-a-bg: #eaf2fb;
  --isa-b: #2e7d4f;
  --isa-b-bg: #eaf6ee;
  --yellow: #fff8e1;
  --yellow-line: #e8d48a;
  --danger: #b3261e;
  --warn: #9a6700;
  --ok: #2e7d4f;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.topbar { background: #12293d; color: #fff; }
.topbar-inner {
  max-width: 1080px; margin: 0 auto; padding: 14px 20px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 17px; letter-spacing: .3px; }
.brand-sub { font-size: 12.5px; color: #b8c9d8; margin-top: 2px; }
.topbar-right { font-size: 13px; color: #cfe0ee; display: flex; align-items: center; gap: 14px; }
.topbar-right a { color: #9fd0f5; text-decoration: none; }
.container { max-width: 1080px; margin: 0 auto; padding: 20px; }
.footer { max-width: 1080px; margin: 30px auto; padding: 0 20px 30px; color: var(--muted); font-size: 12px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 20px 22px; margin-bottom: 18px;
}
h1 { font-size: 21px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 0 0 10px; }
h3 { font-size: 15px; margin: 22px 0 8px; }
.intro { color: var(--muted); font-size: 13.5px; margin-bottom: 14px; }
.pill {
  display: inline-block; padding: 2px 10px; border-radius: 20px;
  font-size: 12px; font-weight: 600; vertical-align: middle;
}
.pill.priority { background: #fdecdc; color: #a04a00; }
.pill.a { background: var(--isa-a-bg); color: var(--isa-a); }
.pill.b { background: var(--isa-b-bg); color: var(--isa-b); }
.pill.grey { background: #eef1f5; color: var(--muted); }
.pill.red { background: #fbe4e2; color: var(--danger); }
.pill.warn { background: #fff3d6; color: var(--warn); }
.pill.ok { background: var(--isa-b-bg); color: var(--ok); }

/* tabs */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 4px 0 18px; }
.tab-btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 9px 15px; border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 550;
}
.tab-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.tab-btn .done { color: var(--ok); font-weight: 700; margin-left: 6px; }
.tab-btn.active .done { color: #bfe8cf; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* question rows */
.qgroup { margin-bottom: 26px; }
.qgroup-head {
  font-weight: 650; font-size: 14.5px; padding: 8px 12px; border-radius: 7px;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 2px;
}
.qgroup.isa-a .qgroup-head { background: var(--isa-a-bg); color: var(--isa-a); }
.qgroup.isa-b .qgroup-head { background: var(--isa-b-bg); color: var(--isa-b); }
.qrow {
  display: grid; grid-template-columns: minmax(260px, 1.4fr) minmax(170px, .8fr) minmax(180px, .9fr);
  gap: 10px 16px; padding: 10px 12px; border-bottom: 1px solid var(--line); align-items: center;
}
.qrow:last-child { border-bottom: none; }
.qrow .qlabel { font-size: 14px; }
.qrow .qlabel.indent { padding-left: 18px; color: #33414f; }
.qrow.disabled { opacity: .45; pointer-events: none; }
input[type=text], input[type=number], textarea, select {
  width: 100%; padding: 8px 10px; border: 1px solid var(--yellow-line);
  background: var(--yellow); border-radius: 7px; font: inherit; color: var(--ink);
}
input:focus, textarea:focus, select:focus { outline: 2px solid #7db3d8; background: #fffdf2; }
textarea { min-height: 64px; resize: vertical; }
.note-input input, .note-input textarea {
  background: #fff; border-color: var(--line); font-size: 13px;
}
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg label {
  border: 1px solid var(--yellow-line); background: var(--yellow); border-radius: 7px;
  padding: 6px 13px; cursor: pointer; font-size: 13.5px; user-select: none;
}
.seg input { display: none; }
.seg label.sel { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.ab-pair { display: flex; gap: 8px; }
.ab-pair .ab { flex: 1; }
.ab .ab-tag { font-size: 11px; font-weight: 700; margin-bottom: 2px; }
.ab.a .ab-tag { color: var(--isa-a); }
.ab.b .ab-tag { color: var(--isa-b); }
.ab.a input { background: var(--isa-a-bg); border-color: #b9d2ea; }
.ab.b input { background: var(--isa-b-bg); border-color: #bcdcc8; }
.ab.disabled { opacity: .4; pointer-events: none; }

/* tables */
table.grid { border-collapse: collapse; width: 100%; font-size: 13.5px; }
table.grid th, table.grid td { border: 1px solid var(--line); padding: 7px 10px; text-align: left; }
table.grid th { background: #f0f3f7; font-weight: 650; }
table.grid td.calc { background: #f0f3f7; color: #2b3a49; font-variant-numeric: tabular-nums; }
table.grid td.assume input { max-width: 110px; }
table.grid .col-a { background: var(--isa-a-bg); }
table.grid .col-b { background: var(--isa-b-bg); }
table.grid th.col-a { color: var(--isa-a); }
table.grid th.col-b { color: var(--isa-b); }
.tbl-scroll { overflow-x: auto; }

/* save state / submit */
.savebar {
  position: sticky; bottom: 0; background: #fff; border-top: 1px solid var(--line);
  padding: 10px 20px; display: flex; justify-content: space-between; align-items: center; gap: 14px;
  box-shadow: 0 -4px 14px rgba(20, 35, 50, .06);
}
.save-status { font-size: 13px; color: var(--muted); }
.save-status.saving { color: var(--warn); }
.save-status.saved { color: var(--ok); }
.save-status.error { color: var(--danger); font-weight: 600; }
button.primary {
  background: var(--accent); color: #fff; border: none; border-radius: 8px;
  padding: 10px 20px; font: inherit; font-weight: 650; cursor: pointer;
}
button.primary:hover { background: #0c4d77; }
button.ghost {
  background: #fff; color: var(--accent); border: 1px solid var(--accent);
  border-radius: 8px; padding: 8px 16px; font: inherit; cursor: pointer;
}
button.danger-ghost { background:#fff; color: var(--danger); border:1px solid var(--danger); border-radius:8px; padding:8px 16px; font:inherit; cursor:pointer; }
.banner {
  border-radius: 9px; padding: 12px 16px; margin-bottom: 16px; font-size: 14px;
}
.banner.info { background: var(--accent-soft); color: #0b4a72; }
.banner.done { background: var(--isa-b-bg); color: #1d5c39; border: 1px solid #bcdcc8; }
.snapshot dt { font-weight: 650; margin-top: 10px; }
.snapshot dd { margin: 2px 0 0; color: var(--muted); font-size: 13.5px; }

/* admin */
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th, .admin-table td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; }
.admin-table th { font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.admin-table tr:hover td { background: #f6f9fc; }
.score-big { font-size: 26px; font-weight: 750; }
.linkbox {
  font-family: ui-monospace, Menlo, monospace; font-size: 12.5px; background: #f0f3f7;
  padding: 6px 9px; border-radius: 6px; word-break: break-all;
}
.flex { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.right { text-align: right; }
.num { font-variant-numeric: tabular-nums; }
form.inline { display: inline; }
.login-card { max-width: 380px; margin: 60px auto; }
.override-input { max-width: 90px; background: #fff; border-color: var(--line); }
.override-comment { background: #fff; border-color: var(--line); font-size: 13px; }

@media (max-width: 760px) {
  .qrow { grid-template-columns: 1fr; gap: 6px; }
  .qrow .note-input { margin-top: 2px; }
}
@media print {
  .topbar, .savebar, .tabs, .footer, .no-print { display: none !important; }
  .card { border: none; padding: 0; margin-bottom: 14px; }
  body { background: #fff; }
  .tab-pane { display: block !important; }
}