/* ==========================================================================
   QLA — stylesheet
   Organised as: tokens -> base -> layout -> components -> views -> responsive
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------ */
:root {
  --brand-50:#eef2ff; --brand-100:#e0e7ff; --brand-200:#c7d2fe;
  --brand-500:#6366f1; --brand-600:#4f46e5; --brand-700:#4338ca; --brand-900:#312e81;

  --ink:#0f172a; --body:#334155; --muted:#64748b; --faint:#94a3b8;
  --line:#e2e8f0; --line-strong:#cbd5e1;
  --surface:#ffffff; --canvas:#f1f5f9; --panel:#f8fafc;

  --ok:#059669; --ok-bg:#ecfdf5; --ok-line:#a7f3d0;
  --warn:#b45309; --warn-bg:#fffbeb; --warn-line:#fde68a;
  --bad:#dc2626;  --bad-bg:#fef2f2;  --bad-line:#fecaca;

  --radius:10px; --radius-lg:14px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.06);
  --shadow:0 1px 3px rgba(15,23,42,.09), 0 8px 24px -12px rgba(15,23,42,.18);
  --shadow-lg:0 20px 50px -20px rgba(15,23,42,.35);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --header-h:60px;
}

/* --- Base --------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
/* The `hidden` attribute must win over any component display rule. Without
   this, `.btn{display:inline-flex}` keeps a hidden button on screen. */
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);font-size:15px;line-height:1.5;
  color:var(--body);background:var(--canvas);
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:600;line-height:1.25}
h1{font-size:1.4rem} h2{font-size:1.15rem} h3{font-size:1rem}
p{margin:0 0 .75rem}
a{color:var(--brand-600)}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:4px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* --- App header --------------------------------------------------------- */
.app-header{
  position:sticky;top:0;z-index:40;height:var(--header-h);
  display:flex;align-items:center;gap:20px;padding:0 20px;
  background:var(--surface);border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none;white-space:nowrap}
.brand-mark{
  width:30px;height:30px;border-radius:8px;flex:none;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-700));
  color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800;letter-spacing:-.02em;
}
.brand-name{font-size:15px}
.brand-name small{display:block;font-size:10.5px;font-weight:500;color:var(--muted);letter-spacing:.04em;text-transform:uppercase}

/* Stepper navigation */
.steps{display:flex;align-items:center;gap:4px;margin-left:auto;margin-right:auto}
.step{
  display:flex;align-items:center;gap:8px;padding:7px 13px;border:0;background:none;
  border-radius:999px;cursor:pointer;color:var(--muted);font:inherit;font-size:14px;font-weight:500;
}
.step:hover{background:var(--panel);color:var(--ink)}
.step[aria-current="page"]{background:var(--brand-50);color:var(--brand-700);font-weight:600}
.step-num{
  width:21px;height:21px;border-radius:999px;background:var(--line);color:var(--muted);
  display:grid;place-items:center;font-size:11.5px;font-weight:700;flex:none;
}
.step[aria-current="page"] .step-num{background:var(--brand-600);color:#fff}
.step.is-done .step-num{background:var(--ok);color:#fff}
.step-sep{width:14px;height:1px;background:var(--line-strong);flex:none}

.header-actions{display:flex;align-items:center;gap:8px}
.save-state{font-size:12.5px;color:var(--muted);white-space:nowrap}
.save-state.is-saving{color:var(--brand-600)}
.save-state.is-error{color:var(--bad);font-weight:600}

/* --- Layout ------------------------------------------------------------- */
.app-main{max-width:1180px;margin:0 auto;padding:26px 20px 90px}
.view{display:none}
.view.is-active{display:block;animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:none}}

.view-head{margin-bottom:20px}
.view-head h1{margin-bottom:4px}
.view-head p{color:var(--muted);margin:0;max-width:70ch}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);margin-bottom:18px;overflow:hidden;
}
.card-head{
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:15px 18px;border-bottom:1px solid var(--line);background:var(--panel);
}
.card-head h2{font-size:1rem}
.card-head .spacer{margin-left:auto}
.card-head p{margin:2px 0 0;font-size:13px;color:var(--muted);flex-basis:100%}
.card-body{padding:18px}
.card-body.flush{padding:0}
.card-foot{padding:13px 18px;border-top:1px solid var(--line);background:var(--panel);display:flex;gap:10px;align-items:center;flex-wrap:wrap}

/* --- Forms -------------------------------------------------------------- */
.grid{display:grid;gap:14px}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}

.field{display:flex;flex-direction:column;gap:5px;min-width:0}
.field > label,.label{font-size:12.5px;font-weight:600;color:var(--ink)}
.field .hint{font-size:12px;color:var(--muted)}
.field .hint.error{color:var(--bad)}

input[type=text],input[type=email],input[type=number],input[type=url],input[type=date],input[type=password],select,textarea{
  width:100%;padding:8px 11px;font:inherit;font-size:14px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line-strong);border-radius:8px;
  transition:border-color .12s,box-shadow .12s;
}
input:hover:not(:disabled),select:hover:not(:disabled),textarea:hover{border-color:var(--faint)}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px var(--brand-100);
}
input:disabled,select:disabled{background:var(--panel);color:var(--muted);cursor:not-allowed}
input[aria-invalid="true"]{border-color:var(--bad);background:var(--bad-bg)}
input[aria-invalid="true"]:focus{box-shadow:0 0 0 3px var(--bad-line)}
textarea{resize:vertical;min-height:78px;line-height:1.5}
select{appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.5' stroke-linecap='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat:no-repeat;background-position:right 9px center;padding-right:30px}

.checkline{display:flex;align-items:flex-start;gap:9px;font-size:14px;cursor:pointer}
.checkline input[type=checkbox]{width:16px;height:16px;margin:2px 0 0;accent-color:var(--brand-600);cursor:pointer;flex:none}
.checkline span small{display:block;color:var(--muted);font-size:12.5px}

/* --- Buttons ------------------------------------------------------------ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:8px 15px;font:inherit;font-size:14px;font-weight:500;line-height:1.3;
  border:1px solid var(--line-strong);border-radius:8px;background:var(--surface);color:var(--ink);
  cursor:pointer;white-space:nowrap;transition:background .12s,border-color .12s,transform .06s;
}
.btn:hover:not(:disabled){background:var(--panel);border-color:var(--faint)}
.btn:active:not(:disabled){transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600}
.btn-primary:hover:not(:disabled){background:var(--brand-700);border-color:var(--brand-700)}
.btn-danger{color:var(--bad);border-color:var(--bad-line)}
.btn-danger:hover:not(:disabled){background:var(--bad-bg)}
.btn-ghost{border-color:transparent;background:transparent}
.btn-ghost:hover:not(:disabled){background:var(--panel);border-color:var(--line)}
.btn-sm{padding:5px 10px;font-size:13px}
.btn-icon{padding:6px;width:30px;height:30px;border-color:transparent;background:transparent;color:var(--muted)}
.btn-icon:hover:not(:disabled){background:var(--bad-bg);color:var(--bad);border-color:var(--bad-line)}
.btn-block{width:100%}
.btn .spinner{width:14px;height:14px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .6s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* --- Tables ------------------------------------------------------------- */
.table-wrap{overflow:auto;max-width:100%}
table.data{width:100%;border-collapse:separate;border-spacing:0;font-size:14px}
table.data th{
  text-align:left;font-size:11.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--muted);background:var(--panel);padding:9px 12px;
  border-bottom:1px solid var(--line);white-space:nowrap;position:sticky;top:0;z-index:2;
}
table.data td{padding:6px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
table.data tbody tr:hover td{background:#fbfcfe}
table.data td input,table.data td select{padding:6px 9px;font-size:13.5px}
table.data .num{text-align:right;font-variant-numeric:tabular-nums}
table.data tfoot td{background:var(--panel);font-weight:600;color:var(--ink);border-top:2px solid var(--line-strong)}
.row-index{color:var(--faint);font-size:12.5px;font-variant-numeric:tabular-nums;width:34px;text-align:right}
.col-actions{width:44px}

/* --- Badges / pills ----------------------------------------------------- */
.badge{
  display:inline-flex;align-items:center;gap:5px;padding:2px 8px;border-radius:999px;
  font-size:11.5px;font-weight:600;line-height:1.6;border:1px solid transparent;white-space:nowrap;
}
.badge-ok{background:var(--ok-bg);color:var(--ok);border-color:var(--ok-line)}
.badge-warn{background:var(--warn-bg);color:var(--warn);border-color:var(--warn-line)}
.badge-bad{background:var(--bad-bg);color:var(--bad);border-color:var(--bad-line)}
.badge-neutral{background:var(--panel);color:var(--muted);border-color:var(--line)}
.badge-brand{background:var(--brand-50);color:var(--brand-700);border-color:var(--brand-200)}

.grade-pill{
  display:inline-grid;place-items:center;min-width:30px;height:26px;padding:0 8px;border-radius:7px;
  background:var(--brand-50);color:var(--brand-700);font-weight:700;font-size:14px;
  border:1px solid var(--brand-200);font-variant-numeric:tabular-nums;
}
.grade-pill.is-u{background:var(--bad-bg);color:var(--bad);border-color:var(--bad-line)}
.grade-pill.is-none{background:var(--panel);color:var(--faint);border-color:var(--line)}
.grade-pill.is-provisional{border-style:dashed}

/* --- Callouts ----------------------------------------------------------- */
.callout{
  display:flex;gap:11px;padding:12px 15px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--panel);font-size:13.5px;line-height:1.5;margin-bottom:14px;
}
.callout:last-child{margin-bottom:0}
.callout strong{display:block;color:var(--ink);margin-bottom:2px}
.callout ul{margin:6px 0 0;padding-left:18px}
.callout li{margin-bottom:3px}
.callout-warn{background:var(--warn-bg);border-color:var(--warn-line);color:#78350f}
.callout-bad{background:var(--bad-bg);border-color:var(--bad-line);color:#7f1d1d}
.callout-ok{background:var(--ok-bg);border-color:var(--ok-line);color:#065f46}
.callout-info{background:var(--brand-50);border-color:var(--brand-200);color:var(--brand-900)}
.callout .ico{flex:none;font-size:15px;line-height:1.4}

/* --- Empty states ------------------------------------------------------- */
.empty{text-align:center;padding:44px 20px;color:var(--muted)}
.empty .ico{font-size:30px;display:block;margin-bottom:10px;opacity:.6}
.empty h3{margin-bottom:5px}
.empty p{max-width:44ch;margin:0 auto 16px}

/* --- Stat strip --------------------------------------------------------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:1px;background:var(--line)}
.stat{background:var(--surface);padding:10px 16px}
.stat .v{font-size:21px;font-weight:700;color:var(--ink);line-height:1.15;font-variant-numeric:tabular-nums}
.stat .k{font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-top:3px}

/* --- Marksheet ---------------------------------------------------------- */
/* The marksheet trades the roomy page header for rows of pupils. */
#view-marksheet .view-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:12px}
#view-marksheet .view-head p{margin:0;font-size:12.5px}

.marksheet-wrap{overflow:auto;max-height:calc(100vh - 300px);min-height:240px;position:relative}
table.marksheet{border-collapse:separate;border-spacing:0;font-size:14px;min-width:100%}
table.marksheet th,table.marksheet td{border-bottom:1px solid var(--line);border-right:1px solid var(--line)}
table.marksheet thead th{
  position:sticky;top:0;z-index:3;background:var(--panel);padding:0;
  border-bottom:2px solid var(--line-strong);vertical-align:bottom;
}
/* A compact header keeps more of the class on screen. */
.qhead .qtopic{-webkit-line-clamp:1}
table.marksheet thead th.pupil-col{left:0;z-index:5}
.qhead{padding:6px 6px;min-width:62px;max-width:82px;text-align:center}
.qhead .qnum{font-size:13px;font-weight:700;color:var(--ink);line-height:1.2}
.qhead .qtopic{
  font-size:10.5px;color:var(--muted);margin-top:3px;line-height:1.3;font-weight:500;
  overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.qhead .qmax{
  display:inline-block;margin-top:4px;padding:1px 6px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-700);font-size:10.5px;font-weight:700;
}
.pupil-col{position:sticky;left:0;background:var(--surface);z-index:2;min-width:170px;max-width:220px}
thead .pupil-col{background:var(--panel)}
.marksheet tbody tr:hover .pupil-col{background:#fbfcfe}
/* One line per pupil. The email address moves to the cell's tooltip and a
   warning icon, which is what actually matters here, and buys back a whole
   text line on every row. */
.pupil-cell{padding:4px 12px;display:flex;align-items:center;gap:7px}
.pupil-cell .nm{font-weight:600;color:var(--ink);font-size:13.5px;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pupil-cell .nm{flex:1 1 auto;min-width:0}
.pupil-cell .warn-dot{flex:none;font-size:12px;line-height:1;color:var(--warn)}

.mark-cell{padding:0;text-align:center;background:var(--surface)}
.mark-input{
  width:100%;height:34px;border:0;border-radius:0;text-align:center;font-size:14px;
  font-variant-numeric:tabular-nums;background:transparent;color:var(--ink);padding:0 2px;
  -moz-appearance:textfield;
}
.mark-input::-webkit-outer-spin-button,.mark-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.mark-input:focus{
  outline:none;box-shadow:inset 0 0 0 2px var(--brand-600);background:var(--brand-50);
  position:relative;z-index:1;font-weight:600;
}
.mark-input.is-invalid{background:var(--bad-bg);box-shadow:inset 0 0 0 2px var(--bad);color:var(--bad);font-weight:700}
.mark-cell.is-blank{background:repeating-linear-gradient(45deg,#fff,#fff 6px,#fafbfc 6px,#fafbfc 12px)}
.mark-cell.is-full .mark-input{color:var(--ok);font-weight:600}
.mark-cell.is-zero .mark-input{color:var(--bad)}

.total-col{background:var(--panel);text-align:right;font-weight:600;color:var(--ink);padding:7px 12px;font-variant-numeric:tabular-nums;white-space:nowrap}
.pct-col{background:var(--panel);text-align:right;color:var(--muted);padding:7px 12px;font-variant-numeric:tabular-nums}
.grade-col{background:var(--panel);text-align:center;padding:5px 12px}
tr.avg-row td{
  background:var(--brand-50)!important;border-top:2px solid var(--brand-200);
  font-weight:600;color:var(--brand-900);position:sticky;bottom:0;z-index:2;
}
tr.avg-row .avg-cell{text-align:center;padding:7px 4px;line-height:1.25}
tr.avg-row .avg-mark{font-size:13.5px;font-variant-numeric:tabular-nums}
tr.avg-row .avg-pct{font-size:10.5px;opacity:.75;font-variant-numeric:tabular-nums}

.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:11.5px;color:var(--muted);padding:7px 18px;border-top:1px solid var(--line);background:var(--panel)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.swatch{width:11px;height:11px;border-radius:3px;border:1px solid var(--line-strong)}
.swatch.blank{background:repeating-linear-gradient(45deg,#fff,#fff 3px,#e8ebef 3px,#e8ebef 6px)}
.swatch.full{background:var(--ok-bg);border-color:var(--ok-line)}
.swatch.zero{background:var(--bad-bg);border-color:var(--bad-line)}

/* --- Feedback list ------------------------------------------------------ */
.send-table td{padding:8px 12px}
.send-table .chk{width:40px;text-align:center}
.send-table input[type=checkbox]{width:16px;height:16px;accent-color:var(--brand-600);cursor:pointer}
.send-table tr.is-blocked td{background:var(--panel);color:var(--muted)}
.send-table tr.is-blocked .nm{color:var(--muted)}
.send-table .nm{font-weight:600;color:var(--ink)}
.send-table .em{font-size:12.5px;color:var(--muted)}
.reasons{display:flex;gap:5px;flex-wrap:wrap;margin-top:3px}

.progress-track{height:7px;border-radius:999px;background:var(--line);overflow:hidden;margin:10px 0 6px}
.progress-bar{height:100%;background:var(--brand-600);border-radius:999px;transition:width .25s ease;width:0}

/* --- Modal -------------------------------------------------------------- */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(2px);
  display:none;align-items:center;justify-content:center;padding:20px;z-index:100;
}
.modal-backdrop.is-open{display:flex}
.modal{
  background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);
  width:100%;max-width:520px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden;
  animation:pop .16s ease;
}
.modal.modal-wide{max-width:720px}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.modal-head{padding:17px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}
.modal-head h2{font-size:1.05rem}
.modal-body{padding:20px;overflow:auto;flex:1}
.modal-body.flush{padding:0}
.modal-foot{padding:14px 20px;border-top:1px solid var(--line);background:var(--panel);display:flex;gap:9px;justify-content:flex-end;flex-wrap:wrap}
.modal-foot .left{margin-right:auto}

.preview-frame{width:100%;height:min(62vh,620px);border:0;display:block;background:#eef2f7}

/* --- Toasts ------------------------------------------------------------- */
.toasts{position:fixed;bottom:18px;right:18px;z-index:200;display:flex;flex-direction:column;gap:9px;max-width:400px}
.toast{
  display:flex;gap:10px;align-items:flex-start;padding:12px 15px;border-radius:var(--radius);
  background:var(--ink);color:#f1f5f9;box-shadow:var(--shadow-lg);font-size:13.5px;line-height:1.45;
  animation:slide .2s ease;
}
@keyframes slide{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}
.toast.ok{background:#065f46} .toast.bad{background:#991b1b} .toast.warn{background:#92400e}
.toast .x{margin-left:auto;background:none;border:0;color:inherit;opacity:.6;cursor:pointer;font-size:16px;line-height:1;padding:0 2px}
.toast .x:hover{opacity:1}

/* --- Footer bar --------------------------------------------------------- */
.view-nav{display:flex;gap:10px;align-items:center;margin-top:22px;flex-wrap:wrap}
.view-nav .spacer{margin-left:auto}

.file-drop{
  border:2px dashed var(--line-strong);border-radius:var(--radius);padding:22px;text-align:center;
  color:var(--muted);font-size:13.5px;transition:border-color .12s,background .12s;cursor:pointer;
}
.file-drop:hover,.file-drop.is-over{border-color:var(--brand-600);background:var(--brand-50);color:var(--brand-700)}

.kbd{
  display:inline-block;padding:1px 5px;border-radius:4px;border:1px solid var(--line-strong);
  border-bottom-width:2px;background:var(--panel);font:600 11px var(--mono);color:var(--body);
}

/* --- Responsive --------------------------------------------------------- */
@media (max-width:900px){
  .grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-label{display:none}
  .step{padding:7px 9px}
  .steps{gap:2px}
}
@media (max-width:640px){
  .app-main{padding:18px 12px 70px}
  .grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}
  .brand-name small{display:none}
  .app-header{padding:0 12px;gap:10px}
  .save-state{display:none}
  .marksheet-wrap{max-height:none}
  .toasts{left:12px;right:12px;bottom:12px;max-width:none}
}
@media print{
  .app-header,.view-nav,.card-foot,.toasts,.legend{display:none!important}
  body{background:#fff}
  .card{box-shadow:none;break-inside:avoid}
}

/* ==========================================================================
   Additions: setup lock, vertical boundaries, Analyse page and charts
   ========================================================================== */

/* --- Setup lock bar ----------------------------------------------------- */
.lockbar{
  display:flex;align-items:center;gap:14px;margin:0 0 18px;padding:12px 16px;
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--line-strong);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);
}
.lockbar.is-locked{border-left-color:var(--warn);background:var(--warn-bg);border-color:var(--warn-line)}
.lockbar.is-armed{border-left-color:var(--ok)}
.lockbar-ico{font-size:20px;line-height:1;flex:none}
.lockbar-text{display:flex;flex-direction:column;gap:2px;min-width:0}
.lockbar-text strong{color:var(--ink);font-size:14px}
.lockbar .hint{font-size:12.5px;color:var(--muted)}

/* A locked Setup still reads clearly — it is dimmed, not hidden. */
.view.is-locked .card{opacity:.72}
.view.is-locked input:disabled,
.view.is-locked select:disabled{background:var(--panel);cursor:not-allowed}

.field-error{color:var(--bad);font-size:13px;min-height:1em}

/* --- Grade boundaries: always a vertical list --------------------------- */
/* Exam boundaries are read as a single column, whatever the screen width. */
.boundary-list{display:flex;flex-direction:column;gap:0;max-width:520px}
.boundary-row{
  display:grid;grid-template-columns:88px 130px 1fr;align-items:center;gap:14px;
  padding:7px 0;border-bottom:1px solid var(--line);
}
.boundary-row:last-child{border-bottom:0}
.boundary-head{
  border-bottom:1px solid var(--line-strong);padding-bottom:8px;
  font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);
}
.boundary-grade{
  display:flex;align-items:baseline;gap:6px;margin:0;
  font-weight:700;font-size:16px;color:var(--ink);
}
.boundary-grade .hint{font-size:11.5px;font-weight:500}
.boundary-row input{width:100%}
.boundary-band{font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}

/* --- Inline explanatory notes ------------------------------------------- */
.note-inline{
  flex-basis:100%;margin:8px 0 0;font-size:12.5px;line-height:1.45;color:var(--muted);
}
.note{padding:12px 14px;border-radius:var(--radius);font-size:13.5px;line-height:1.5;margin:0 0 16px}
.note-warn{background:var(--warn-bg);border:1px solid var(--warn-line);color:#7c2d12}

/* --- Marksheet tweaks --------------------------------------------------- */
.avg-outof{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.awaiting{color:var(--faint);cursor:help}

/* --- Feedback: parent column ------------------------------------------- */
.send-table th.chk{white-space:nowrap}
.chk-caption{
  display:block;font-size:10.5px;font-weight:600;letter-spacing:.04em;
  text-transform:uppercase;color:var(--muted);padding-top:3px;
}
.wording-fields{display:grid;gap:12px}
.wording-fields textarea{min-height:74px;resize:vertical}
.tabs{display:flex;gap:6px}

/* --- Analyse page ------------------------------------------------------- */
.stat-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:0 0 18px;
}
.stat-row .stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 16px;box-shadow:var(--shadow-sm);
}
.stat-value{font-size:26px;font-weight:700;color:var(--ink);line-height:1.15}
.stat-label{font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);padding-top:5px}

.customise{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  margin:0 0 18px;box-shadow:var(--shadow-sm);
}
.customise>summary{padding:12px 16px;cursor:pointer;font-weight:600;color:var(--ink);font-size:14px}
.customise>summary:hover{background:var(--panel)}
.customise-body{padding:4px 16px 16px;border-top:1px solid var(--line);display:grid;gap:16px}
.customise .field-group{border:0;padding:0;margin:0}
.customise legend{
  padding:0 0 8px;font-size:11.5px;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted);
}
.check-row{display:flex;flex-wrap:wrap;gap:8px 20px}
.check{display:flex;align-items:center;gap:8px;font-size:14px;cursor:pointer}
.customise-selects{display:flex;flex-wrap:wrap;gap:16px}
.field-sm{max-width:220px}
.field-sm .label{
  display:block;font-size:11.5px;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted);padding-bottom:5px;
}
.input-sm{padding:6px 10px;font-size:13.5px}

/* align-items:start so a short chart card does not inherit dead space from a
   taller neighbour in the same row. */
.viz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:16px;margin-top:16px;align-items:start}
.viz-card{padding:16px 18px 18px}
.viz-card-head{display:flex;align-items:flex-start;gap:12px;margin-bottom:10px}
.viz-card-head h3{font-size:15px}
.viz-card-head p{margin:4px 0 0;max-width:52ch}
.viz-card-head .btn{margin-left:auto;flex:none}
.viz-plot{width:100%;min-height:40px}
.viz-table{max-height:320px;overflow:auto}

/* --- Chart marks -------------------------------------------------------- */
/* One hue throughout: these are single-series charts, so colour carries no
   identity and a value-ramp would double-encode the bar length. */
.viz{display:block;overflow:visible}
.viz-bar{fill:#2a78d6}
.viz-bar:hover,.viz-bar:focus{fill:#1c5cab;outline:none}
.viz-slice{stroke:var(--surface);stroke-width:2}   /* the 2px surface gap */
.viz-slice:hover,.viz-slice:focus{opacity:.85;outline:none}
.viz-grid{stroke:var(--line);stroke-width:1}       /* solid hairline, never dashed */
.viz-axis{stroke:var(--line-strong);stroke-width:1}
.viz-boundary{stroke:var(--faint);stroke-width:1}
.viz-tick,.viz-label,.viz-axis-title,.viz-boundary-label{
  fill:var(--muted);font-family:var(--font);font-size:11px;font-variant-numeric:tabular-nums;
}
.viz-axis-title{font-size:10.5px;letter-spacing:.05em;text-transform:uppercase}
.viz-boundary-label{font-weight:700;fill:var(--body)}
.viz-value{fill:var(--ink);font-family:var(--font);font-size:12px;font-weight:600}
.viz-value.is-zero{fill:var(--faint);font-weight:500}
.viz-slice-label{fill:#fff;font-family:var(--font);font-size:12px;font-weight:700}
.viz-donut-total{fill:var(--ink);font-family:var(--font);font-size:26px;font-weight:700}
.viz-donut-caption{fill:var(--muted);font-family:var(--font);font-size:11px}

.viz-legend{display:flex;flex-wrap:wrap;gap:6px 16px;list-style:none;margin:12px 0 0;padding:0;font-size:12.5px;color:var(--body)}
.viz-legend li{display:flex;align-items:center;gap:7px}
.viz-swatch{width:11px;height:11px;border-radius:3px;flex:none}

.viz-tip{
  position:fixed;z-index:80;pointer-events:none;opacity:0;transition:opacity .12s;
  background:var(--ink);color:#fff;font-size:12.5px;padding:6px 10px;border-radius:7px;
  box-shadow:var(--shadow);white-space:nowrap;
}
.viz-tip.is-open{opacity:1}

/* --- Meters (topic and question performance) ---------------------------- */
.meters{display:flex;flex-direction:column;gap:13px}
.meter-head{display:flex;align-items:baseline;gap:10px;margin-bottom:5px}
.meter-label{
  font-size:13.5px;color:var(--body);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.meter-value{margin-left:auto;flex:none;font-size:13.5px;font-variant-numeric:tabular-nums;color:var(--ink)}
.meter-outof{color:var(--muted);font-weight:500}
.meter-track{height:9px;border-radius:5px;background:#cde2fb;overflow:hidden}
.meter-fill{height:100%;border-radius:5px;background:#2a78d6}
.meter-sub{font-size:11.5px;color:var(--muted);padding-top:4px}

.data-table{width:100%;border-collapse:collapse;font-size:13.5px}
.data-table th,.data-table td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left}
.data-table th{
  font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);
  background:var(--panel);position:sticky;top:0;
}
.data-table td.num,.data-table th.num{text-align:right;font-variant-numeric:tabular-nums}
.data-table.compact th,.data-table.compact td{padding:6px 9px}
.pill{display:inline-block;padding:1px 8px;border-radius:999px;font-size:12px;font-weight:600}
.pill-warn{background:var(--warn-bg);color:var(--warn);border:1px solid var(--warn-line)}

@media (max-width:640px){
  .boundary-row{grid-template-columns:70px 100px 1fr;gap:10px}
  .viz-grid{grid-template-columns:1fr}
}

@media (prefers-reduced-motion:reduce){
  .viz-tip{transition:none}
}

/* --- Preview and edit email --------------------------------------------- */
.preview-shell{display:flex;flex-direction:column;min-height:0}
.preview-toolbar{
  display:grid;grid-template-columns:auto 1fr;gap:10px 16px;align-items:end;
  padding:14px 16px;border-bottom:1px solid var(--line);background:var(--panel);
}
.preview-toolbar .tabs{align-self:end}
.preview-subject{min-width:0}
.preview-subject .label{
  display:block;font-size:11px;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted);padding-bottom:4px;
}
.subject-input{width:100%}
.preview-tip,.preview-toolbar .hint{grid-column:1 / -1;margin:0;font-size:12.5px;line-height:1.5}
/* Mirrors the placeholder highlight used inside the email preview, so the
   explanation and the thing it explains look the same. */
.ph-chip{background:rgba(79,70,229,.12);border-radius:3px;padding:0 4px;color:var(--brand-700);font-weight:600}
.preview-frame{width:100%;border:0;background:#eef2f7;flex:1 1 auto;min-height:56vh}

/* Locked pages: the card contents recede, the lock bar does not. */
.view.is-locked .lockbar{opacity:1}

/* --- Marksheet: full-window mode ---------------------------------------- */
/* Everything except the grid gets out of the way. The card becomes the page. */
body.marks-expanded{overflow:hidden}
body.marks-expanded .app-header,
body.marks-expanded #view-marksheet .view-head,
body.marks-expanded #view-marksheet #marksheet-blocker,
body.marks-expanded #view-marksheet .card:not(#marksheet-card),
body.marks-expanded #view-marksheet .view-nav{display:none}
body.marks-expanded #marksheet-card{
  position:fixed;inset:0;z-index:70;margin:0;border:0;border-radius:0;
  display:flex;flex-direction:column;box-shadow:none;
}
body.marks-expanded #marksheet-card .marksheet-wrap{
  flex:1 1 auto;min-height:0;max-height:none;
}
body.marks-expanded #marksheet-card .card-head{flex:none;padding:8px 16px}
body.marks-expanded #marksheet-card .legend{flex:none;padding:4px 16px}
/* Expanded, the stats become a single line so the space goes to pupils. */
body.marks-expanded #marksheet-card .stats{
  flex:none;grid-template-columns:repeat(auto-fit,minmax(120px,auto));justify-content:start;
}
body.marks-expanded #marksheet-card .stat{display:flex;align-items:baseline;gap:7px;padding:5px 14px}
body.marks-expanded #marksheet-card .stat .v{font-size:15px}
body.marks-expanded #marksheet-card .stat .k{margin-top:0;font-size:10px}

/* --- Short screens: trade page furniture for rows ----------------------- */
@media (max-height:820px){
  #view-marksheet .view-head{margin-bottom:8px}
  #view-marksheet .view-head p{display:none}
  #view-marksheet .stat{padding:6px 14px}
  #view-marksheet .stat .v{font-size:17px}
  #view-marksheet .stat .k{font-size:10px;margin-top:1px}
  #view-marksheet .legend{padding:5px 18px}
}

/* --- Feedback: scope of an edit ----------------------------------------- */
.scope-banner{grid-column:1 / -1;margin:0}
.scope-banner strong{display:block}
.confirm-lead{margin:0 0 10px;font-size:15.5px;color:var(--ink)}