/* ============================================================
   BrainBit Teaching · Assessment Portal
   Shares the visual language of the tutorial decks.
   ============================================================ */
:root{
  --bg:#f3f7fb; --bg2:#e5f3fc;
  --paper:#fff;
  --ink:#132238; --muted:#5a6b80; --line:#dbe4ee;
  --navy:#0d3b73; --blue:#1677d2; --sky:#29a3e0;
  /* Primary action: orange fill with navy text (white on this orange fails AA). */
  --btn-bg:#f28c28; --btn-ink:#0d3b73; --btn-hover:#f7a14b; --btn-edge:#c9691a;
  /* Older aliases, re-pointed at the brand palette. */
  --indigo:#1677d2; --cyan:#1677d2; --emerald:#1677d2;
  --magenta:#0d3b73; --violet:#33465c; --amber:#8a6514;
  --rose:#b42318; --pink:#8a6514;
  --font-display:"Source Sans 3","Segoe UI",system-ui,sans-serif;
  --font-body:"Source Sans 3","Segoe UI",system-ui,sans-serif;
  --font-mono:"Cascadia Code","Consolas",ui-monospace,monospace;
  --r:4px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:var(--font-body); color:var(--ink); min-height:100vh;
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:900px;margin:0 auto;padding:32px 22px 80px}
.wrap.narrow{max-width:620px}
.wrap.wide{max-width:1080px}
.plans-wrap{padding:0}
.plans-wrap #plans-panel:not([hidden]){padding:32px 22px 80px}

/* ---- brand header ---- */
.brand{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.brand-link{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.brand .logo{width:34px;height:34px;border-radius:6px;display:block;background:#fff;
  object-fit:contain;box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.brand b{font-family:var(--font-display);letter-spacing:.02em;font-size:1.15rem}
.brand span{opacity:.7;font-size:.85rem}
.portal-nav{display:flex;flex-wrap:wrap;gap:.45rem 1.2rem;margin:0 0 1.6rem;font-weight:600}
.portal-nav a{color:var(--navy);text-decoration:none;white-space:nowrap}
.portal-nav a:hover{text-decoration:underline}

/* ---- typography ---- */
h1{font-family:var(--font-display);font-weight:700;line-height:1.05;letter-spacing:-.5px;
  font-size:clamp(1.8rem,4vw,2.8rem)}
h2{font-family:var(--font-display);font-weight:700;font-size:1.35rem;margin-bottom:.4rem}
.grad{color:var(--indigo);font-weight:700}
.lead{font-size:1.05rem;line-height:1.55;opacity:.9;margin:.6rem 0 1.4rem;max-width:60ch}
.kicker{font-family:var(--font-mono);font-size:.74rem;letter-spacing:.28em;text-transform:uppercase;
  font-weight:600;color:var(--cyan);display:inline-flex;align-items:center;gap:.6em;margin-bottom:.6rem}
.kicker::before{content:"";width:28px;height:2px;background:linear-gradient(90deg,var(--cyan),var(--magenta))}
.muted{color:var(--muted)}

/* ---- cards / glass ---- */
.card{background:var(--paper);border:1px solid var(--line);
  border-radius:var(--r);padding:1.4rem 1.5rem}
.card + .card{margin-top:1rem}

/* ---- test choice tiles ---- */
.tests{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.2rem 0}
@media (max-width:640px){.tests{grid-template-columns:1fr}}
.test-tile{cursor:pointer;text-align:left;border-radius:var(--r);padding:1.3rem;
  background:var(--paper);border:1px solid var(--line);transition:.12s;color:inherit}
.test-tile:hover{border-color:var(--blue)}
.test-tile.sel{border-color:var(--navy);box-shadow:0 0 0 2px var(--navy) inset}
.test-tile .emoji{font-size:1.8rem}
.test-tile h3{font-family:var(--font-display);font-size:1.15rem;margin:.5rem 0 .25rem}
.test-tile p{font-size:.84rem;opacity:.8}
.test-tile .meta{margin-top:.7rem;display:flex;gap:.5rem;flex-wrap:wrap}

.pill{display:inline-flex;align-items:center;gap:.4em;padding:.32em .75em;border-radius:999px;
  font-size:.72rem;font-weight:600;font-family:var(--font-mono);
  background:var(--bg2);color:var(--navy);border:1px solid var(--line)}
.pill.amber{background:#f8efd6;color:#7a5410;border-color:#e4d3a0}
.pill.green{background:#e3f3ea;color:#145c3a;border-color:#b7dcc8}
.pill.lock{background:#ececec;color:#5c6b64;border-color:#d5d5d5}

/* locked (admin not yet activated) test tile */
.test-tile.locked{cursor:not-allowed;opacity:.6;filter:grayscale(.4)}
.test-tile.locked:hover{transform:none;border-color:rgba(160,180,255,.2);box-shadow:none}

/* ---- forms ---- */
label{display:block;font-size:.82rem;font-weight:600;letter-spacing:.02em;
  color:#3d4a44;margin:.9rem 0 .35rem}
input[type=text],input[type=tel],input[type=password],input[type=email],select{
  width:100%;font-family:var(--font-body);font-size:1rem;color:var(--ink);
  background:#fff;border:1px solid var(--line);
  border-radius:4px;padding:.7rem .85rem;transition:.15s}
input:focus,select:focus{outline:none;border-color:var(--blue);background:#fff}
select option{color:var(--ink);background:#fff}
.hint{font-size:.76rem;color:var(--muted);margin-top:.3rem}
.field-err input{border-color:var(--rose)}
.err{color:#b42318;font-size:.86rem;margin-top:.7rem;min-height:1em}
.ok{color:#10b981;font-size:.9rem}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;cursor:pointer;
  font-family:var(--font-display);font-weight:700;font-size:1rem;letter-spacing:.02em;
  border:none;border-radius:6px;padding:.8rem 1.5rem;color:var(--btn-ink);
  background:var(--btn-bg);box-shadow:0 2px 0 var(--btn-edge);transition:.12s}
.btn:hover{background:var(--btn-hover)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.ghost{background:#fff;border:1px solid var(--blue);
  box-shadow:none;color:var(--blue)}
.btn.ghost:hover{background:var(--bg2);color:var(--navy)}
.btn.danger{background:#b42318;color:#fff;box-shadow:none}
.btn.danger:hover{background:#912018}
.btn.block{width:100%;margin-top:1.3rem}
.btn + .btn{margin-left:.5rem}
.btn.sm{font-size:.85rem;padding:.5rem .9rem}

/* ============================================================
   TEST SCREEN
   ============================================================ */
.examtop{position:sticky;top:0;z-index:20;display:flex;align-items:center;
  justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1.2rem;
  padding:.9rem 1.1rem;border-radius:4px;
  background:var(--navy);color:#fff;border:1px solid var(--navy)}
.examtop .who{font-size:.9rem}
.examtop .who b{color:#fff}
.progresswrap{flex:1;min-width:160px;height:8px;border-radius:99px;
  background:rgba(120,140,220,.2);overflow:hidden}
.progressbar{height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,var(--indigo),var(--cyan))}
.timer{font-family:var(--font-mono);font-weight:700;font-size:1.4rem;letter-spacing:.06em;
  padding:.25em .7em;border-radius:4px;min-width:4.6em;text-align:center;
  background:#0e241c;border:1px solid #8fbfa4;color:#d5eadc}
.timer.warn{background:#3b1010;border-color:#f0b8b2;
  color:#fda4af;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}

.q{margin:0 0 1rem}
.q .qhead{display:flex;gap:.6rem;align-items:baseline;margin-bottom:.5rem}
.q .qn{font-family:var(--font-mono);font-weight:700;color:var(--navy)}
.qtag{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;
  font-weight:700;padding:.22em .6em;border-radius:999px;align-self:center}
.qtag.coding{background:#e3f3ea;border:1px solid #b7dcc8;color:#145c3a}
.qtag.concept{background:var(--bg2);border:1px solid var(--line);color:var(--navy)}
.q .qtext{font-size:1.02rem;line-height:1.5;white-space:pre-wrap}
.pre-wrap{white-space:pre-wrap}
/* question sets: one shared passage/table, its questions boxed under it */
.set-box{border:2px solid var(--bg2);border-radius:var(--r);background:#f8faf8;padding:.85rem .85rem .1rem;margin:0 0 1rem}
.set-box .q.card{background:var(--paper)}
.set-head{font-weight:700;font-size:.92rem;color:var(--blue);margin-bottom:.5rem}
.set-passage{line-height:1.55;margin-bottom:.75rem}
.set-table-wrap{overflow-x:auto;margin-bottom:.75rem}
.set-table{border-collapse:collapse;font-size:.92rem;background:var(--paper)}
.set-table th,.set-table td{border:1px solid #c9d3cd;padding:.3rem .55rem;text-align:left;vertical-align:top;white-space:pre-wrap}
.set-table th{background:var(--bg2)}
.qcode{margin:.6rem 0;font-family:var(--font-mono);font-size:.88rem;line-height:1.55;
  white-space:pre;overflow:auto;background:#0a0f24;color:#e6ecff;
  border:1px solid rgba(120,140,220,.28);border-radius:12px;padding:.8rem 1rem}

.opts{display:grid;gap:.5rem;margin-top:.7rem}
.opt{display:flex;align-items:center;gap:.7rem;cursor:pointer;
  border:1px solid var(--line);border-radius:4px;padding:.65rem .85rem;
  transition:.13s;background:#fff}
.opt:hover{border-color:var(--blue);background:var(--bg2)}
.opt.checked{border-color:var(--navy);background:var(--bg2);
  box-shadow:0 0 0 1px var(--navy) inset}
.opt input{appearance:none;width:20px;height:20px;flex:0 0 auto;border-radius:50%;
  border:2px solid var(--blue);position:relative;cursor:pointer}
.opt.checked input{border-color:var(--cyan)}
.opt.checked input::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--cyan)}
.opt .letter{font-family:var(--font-mono);font-weight:700;color:#5c6b64;flex:0 0 auto}
.opt.checked .letter{color:var(--cyan)}
.opt .otext{font-size:.96rem;white-space:pre-wrap}
.opt.code .otext{font-family:var(--font-mono);font-size:.88rem}

.submitbar{position:sticky;bottom:0;margin-top:1.4rem;padding:1rem 0 .4rem;
  background:linear-gradient(180deg,transparent,var(--bg) 40%);
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.answered{font-size:.88rem;color:var(--muted)}
.answered b{color:var(--ink)}

/* ============================================================
   RESULT
   ============================================================ */
.result{text-align:center;padding:2.4rem 1.6rem}
.scorering{width:170px;height:170px;border-radius:50%;margin:0 auto 1.2rem;
  display:grid;place-items:center;position:relative}
.scorering .pct{font-family:var(--font-display);font-weight:700;font-size:2.6rem}
.scorering .of{font-family:var(--font-mono);font-size:.8rem;opacity:.7;margin-top:.2rem}
.verdict{display:inline-block;font-family:var(--font-display);font-weight:700;font-size:1.5rem;
  padding:.3em .9em;border-radius:12px;margin:.4rem 0 1rem}
.verdict.pass{background:#e3f3ea;color:#145c3a;border:1px solid #b7dcc8}
.verdict.fail{background:#fde8e6;color:#b42318;border:1px solid #f0b8b2}

/* ============================================================
   MERIT TABLE (admin)
   ============================================================ */
.tabs{display:flex;gap:.5rem;margin-bottom:1.4rem;flex-wrap:wrap}
.tabs .btn{
  background:#fff;color:var(--blue);border:1px solid var(--line);box-shadow:none;
}
.tabs .btn:hover{background:var(--bg2)}
.tab{cursor:pointer;font-family:var(--font-mono);font-size:.8rem;font-weight:600;
  padding:.6rem 1.05rem;border-radius:4px;color:var(--navy);transition:.15s;
  background:#fff;border:1px solid var(--line)}
.tab:hover{background:var(--bg2)}
.tab.active{background:var(--navy);border-color:var(--navy);color:#fff}
.controls{display:flex;gap:.8rem;flex-wrap:wrap;align-items:flex-end;margin-bottom:1.2rem}
.controls .grow{flex:1;min-width:180px}
table.merit{width:100%;border-collapse:collapse;font-size:.92rem}
table.merit th{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;
  text-align:left;padding:.6rem .7rem;color:var(--muted);border-bottom:2px solid rgba(99,102,241,.3)}
table.merit td{padding:.6rem .7rem;border-bottom:1px solid rgba(99,102,241,.12)}
table.merit tr:hover td{background:rgba(99,102,241,.06)}
.rank{font-family:var(--font-display);font-weight:700;font-size:1.05rem}
.rank.r1{color:#7a5410}.rank.r2{color:#3d4a44}.rank.r3{color:#9a6b12}
.badge{font-family:var(--font-mono);font-size:.7rem;padding:.2em .55em;border-radius:999px}
.badge.pass{background:#e3f3ea;color:#145c3a}
.badge.fail{background:#fde8e6;color:#b42318}
.empty{text-align:center;padding:2rem;color:var(--muted)}

.footer{margin-top:2.4rem;font-family:var(--font-mono);font-size:.72rem;opacity:.45;text-align:center}
a.link{color:var(--blue);text-decoration:none}
a.link:hover{text-decoration:underline}

/* ---- contact line above the legal footer, and the WhatsApp button ---- */
.help-line{margin-top:2.4rem;text-align:center;font-size:.92rem;line-height:1.9;color:var(--ink)}
.help-line a{color:var(--emerald);font-weight:600;white-space:nowrap}
.help-line + .footer{margin-top:.6rem}
.wa-float{position:fixed;right:18px;bottom:18px;z-index:50;width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;background:#1fa855;color:#fff;box-shadow:0 4px 14px rgba(0,0,0,.25)}
.wa-float svg{width:30px;height:30px}
.wa-float:hover{background:#178c45}
.wa-float:focus-visible{outline:3px solid var(--navy);outline-offset:3px}
/* the dashboard's own button keeps its green when chrome.css loads after this file */
.dash-app .wa-float{background:#1fa855}
.dash-app .wa-float:hover{background:#178c45}
@media (max-width:560px){.wa-float{width:50px;height:50px;right:14px;bottom:14px}}
@media print{.wa-float,.help-line{display:none !important}}
.qr-flags{margin:.35rem 0;display:flex;flex-wrap:wrap;gap:.35rem}

/* ---- teacher / admin login on the navy split band ---- */
.auth-band{padding:2.4rem 0 2.6rem}
.auth-pitch h1{margin:.2rem 0 1rem;font-size:clamp(1.7rem,4vw,2.4rem);line-height:1.2}
.auth-ticks{list-style:none;margin:0 0 1.2rem;padding:0}
.auth-ticks li{position:relative;padding:.3rem 0 .3rem 1.9rem;color:#fff;font-size:1.05rem}
.auth-ticks li::before{content:"\2713";position:absolute;left:0;top:.3rem;width:1.35rem;height:1.35rem;border-radius:50%;
  background:#e9b10e;color:#0d3b73;font-size:.85rem;font-weight:700;line-height:1.35rem;text-align:center}
.auth-pitch .band-lead a{color:#fff;text-decoration:underline}
.auth-band .band-card h2{margin-top:0}
@media (max-width:899px){.auth-band .band-card{order:-1}}