/* SA-IMD Prep — "Editorial" design system (2026-10-06)
   Matches the SSC Question Pattern Analysis report page:
   IBM Plex Sans + Newsreader serif, teal primary, warm neutrals. */
:root{
  color-scheme:light;
  --bg:#f3f6f4;
  --card:#ffffff;
  --ink:#102a2b;
  --muted:#536566;
  --faint:#8fa0a0;
  --line:#cbd7d2;
  --primary:#087f78;
  --primary-dark:#066a63;
  --primary-tint:#ddf0ee;
  --accent:#d8682d;
  --accent-tint:#fbe8da;
  --gold:#a87300;
  --gold-tint:#f7ecd4;
  --blue:#2b648e;
  --green:#16a34a;
  --green-tint:#e8f7ee;
  --red:#dc2626;
  --red-tint:#fdecec;
  --radius:20px 8px 20px 20px;
  --radius-sm:14px 6px 14px 14px;
  --shadow:0 2px 14px rgba(8,127,120,.09);
  --shadow-sm:0 1px 6px rgba(8,127,120,.08);
  --font-body:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-display:"Newsreader",Georgia,"Times New Roman",serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:linear-gradient(180deg,#e8f1ee 0%,var(--bg) 320px);
  background-attachment:fixed;
  color:var(--ink);
  line-height:1.55;font-size:16px;
}
.app{max-width:480px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}

/* ---------- app bar ---------- */
.appbar{padding:20px 16px 6px}
.brand h1{
  font-family:var(--font-display);font-size:1.6rem;font-weight:650;
  letter-spacing:-.02em;color:var(--ink);
}
.brand p{color:var(--muted);font-size:.82rem;margin-top:2px}
.chips{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--primary-tint);color:var(--primary-dark);
  font-size:.78rem;font-weight:700;
  padding:7px 12px;border-radius:999px;white-space:nowrap;
}
.chip.streak{background:var(--gold-tint);color:var(--gold)}
.chip .n{font-variant-numeric:tabular-nums}

/* ---------- auth ---------- */
#authbar{padding:6px 16px 2px;display:flex;justify-content:flex-end}
#authbar .small{color:var(--faint);font-size:.78rem}
#sb-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
#sb-email,#sb-pass{
  padding:9px 12px;border:1.5px solid var(--line);border-radius:12px;
  font-size:.88rem;max-width:210px;background:#fff;color:var(--ink);
  font-family:var(--font-body);
}
#sb-email:focus,#sb-pass:focus{outline:none;border-color:var(--primary)}
#authbar .btn{padding:9px 14px;font-size:.85rem}
.linklike{background:none;border:0;color:var(--primary);font-size:.75rem;text-decoration:underline;cursor:pointer;padding:4px 2px;font-family:var(--font-body)}

/* ---------- layout ---------- */
main{flex:1;padding:10px 16px 24px}
main section[hidden]{display:none}

/* ---------- cards ---------- */
.card{
  background:var(--card);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;margin-bottom:14px;
}
.card h3{
  font-family:var(--font-display);font-size:1.2rem;font-weight:650;
  margin-bottom:6px;letter-spacing:-.01em;
}
.small{color:var(--muted);font-size:.85rem}
.center{text-align:center}

/* ---------- hero (today) ---------- */
.hero{
  background:linear-gradient(135deg,#087f78 0%,#0fa39a 100%);
  color:#fff;border-radius:24px 10px 24px 24px;padding:22px 18px;margin-bottom:14px;
  box-shadow:0 6px 22px rgba(8,127,120,.30);
}
.hero .live{
  display:inline-block;background:rgba(255,255,255,.18);color:#fff;
  font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;margin-bottom:10px;
}
.hero h2{
  font-family:var(--font-display);font-size:1.45rem;font-weight:650;
  margin-bottom:2px;letter-spacing:-.01em;
}
.hero .sub{color:#d7efec;font-size:.85rem;margin-bottom:14px}
.sec-row{
  display:flex;align-items:center;gap:12px;
  background:rgba(255,255,255,.14);border-radius:12px;
  padding:10px 12px;margin-bottom:8px;
}
.sec-row .num{
  width:28px;height:28px;border-radius:50%;flex:none;
  background:#fff;color:var(--primary-dark);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.85rem;font-family:var(--font-display);
}
.sec-row .lbl{flex:1;font-weight:600;font-size:.92rem}
.sec-row .cnt{font-size:.78rem;color:#d7efec;font-weight:600}
.hero .btn{width:100%;margin-top:10px;background:#fff;color:var(--primary-dark)}
.hero .btn:hover{background:#f0faf9}

/* ---------- buttons ---------- */
.btn{
  display:inline-block;border:none;cursor:pointer;
  background:var(--primary);color:#fff;
  font-family:var(--font-body);
  font-size:.95rem;font-weight:600;
  padding:13px 22px;border-radius:14px 6px 14px 14px;
  transition:transform .06s ease,background .15s;
}
.btn:hover{background:var(--primary-dark)}
.btn:active{transform:scale(.98)}
.btn.secondary{background:var(--primary-tint);color:var(--primary-dark)}
.btn.secondary:hover{background:#cde8e5}
.btn.big{width:100%;padding:15px;font-size:1rem}
.btn:disabled{opacity:.6;cursor:default}

/* ---------- quiz ---------- */
.progress{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:14px}
.progress>div{height:100%;background:linear-gradient(90deg,var(--primary),#0fa39a);border-radius:99px;transition:width .25s}
.q-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.tag{
  font-size:.7rem;font-weight:700;color:var(--primary-dark);
  background:var(--primary-tint);border-radius:999px;padding:3px 10px;
  white-space:nowrap;
}
.tag.plain{background:#edf2f1;color:var(--muted)}
.q-text{font-size:1.08rem;font-weight:500;line-height:1.5;margin-bottom:14px}
.opts{display:grid;gap:10px}
.opt{
  display:flex;align-items:center;gap:12px;width:100%;text-align:left;cursor:pointer;
  background:#fff;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  padding:13px 14px;font-size:.95rem;color:var(--ink);
  font-family:var(--font-body);
  transition:border-color .12s,background .12s;
}
.opt:hover:not(:disabled){border-color:var(--primary)}
.opt:disabled{cursor:default;opacity:.95}
.opt .letter{
  flex:none;width:30px;height:30px;border-radius:10px 4px 10px 10px;
  background:var(--primary-tint);color:var(--primary-dark);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.85rem;
}
.opt.correct{background:var(--green-tint);border-color:var(--green);color:#14532d}
.opt.correct .letter{background:var(--green);color:#fff}
.opt.wrong{background:var(--red-tint);border-color:var(--red);color:#7f1d1d}
.opt.wrong .letter{background:var(--red);color:#fff}
.opt.reveal-correct{background:var(--green-tint);border-color:var(--green)}
.opt.reveal-correct .letter{background:var(--green);color:#fff}
.explain{
  margin-top:14px;background:#eef4f3;border-radius:12px;
  padding:13px 14px;font-size:.9rem;color:#3d5454;
}
.explain b{color:var(--ink)}
.card .btn[data-next]{margin-top:14px;width:100%}
.score-big{
  font-family:var(--font-display);font-size:2.6rem;font-weight:650;
  color:var(--primary-dark);margin:8px 0;
}

/* ---------- practice form ---------- */
.field{margin-bottom:12px}
.field label{display:block;font-size:.8rem;font-weight:600;color:var(--muted);margin-bottom:6px}
select,input[type=text]{
  width:100%;padding:12px;border:1.5px solid var(--line);border-radius:12px;
  font-size:.95rem;background:#fff;color:var(--ink);font-family:var(--font-body);
}
select:focus,input[type=text]:focus{outline:none;border-color:var(--primary)}

/* ---------- bank ---------- */
.searchbar{position:relative;margin-bottom:10px}
.chiprow{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.fchip{
  border:1.5px solid var(--line);background:#fff;color:var(--muted);
  font-size:.82rem;font-weight:600;padding:8px 14px;border-radius:999px;cursor:pointer;
  font-family:var(--font-body);
}
.fchip.active{background:var(--primary);border-color:var(--primary);color:#fff}
.qcard{
  background:var(--card);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:16px;margin-bottom:12px;
}
.qcard .q-text{font-size:.98rem;margin-bottom:10px}
.qcard details summary{
  cursor:pointer;color:var(--primary-dark);font-weight:600;font-size:.88rem;
  list-style:none;display:inline-flex;align-items:center;gap:6px;
}
.qcard details summary::-webkit-details-marker{display:none}
.qcard details .explain{margin-top:10px}
.flip{
  background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow-sm);
  padding:16px;margin-bottom:12px;cursor:pointer;
}
.flip .ans{
  margin-top:12px;padding-top:12px;border-top:1px dashed var(--line);
  font-weight:600;color:var(--green);font-size:1.02rem;
}
.flip .hint{color:var(--faint);font-size:.78rem;margin-top:8px}

/* ---------- notes ---------- */
.notes-group{margin-bottom:14px}
.notes-group>h3{margin-bottom:8px}
details.note{
  background:var(--card);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);
  margin-bottom:8px;overflow:hidden;
}
details.note summary{
  cursor:pointer;list-style:none;display:flex;align-items:center;gap:10px;
  padding:14px 16px;font-weight:600;font-size:.93rem;
}
details.note summary::-webkit-details-marker{display:none}
details.note summary .weight{
  margin-left:auto;flex:none;font-size:.72rem;font-weight:700;color:var(--gold);
  background:var(--gold-tint);padding:4px 10px;border-radius:999px;white-space:nowrap;
}
details.note summary::after{
  content:"›";color:var(--faint);font-size:1.2rem;font-weight:700;
  transform:rotate(90deg);transition:transform .15s;
}
details.note[open] summary::after{transform:rotate(-90deg)}
.note-pt{
  padding:10px 16px 10px 20px;font-size:.88rem;color:#3d5454;
  border-top:1px solid var(--line);position:relative;
}
.note-pt::before{
  content:"";position:absolute;left:16px;top:0;bottom:0;width:2px;background:var(--primary-tint);
}
.note-pt:first-of-type{border-top:none}

/* ---------- ranks ---------- */
.rank-banner{
  background:var(--primary-tint);color:var(--primary-dark);border-radius:14px;
  padding:12px 16px;font-size:.88rem;font-weight:600;margin-bottom:14px;
}
.rank-row{
  display:flex;align-items:center;gap:12px;
  background:var(--card);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);
  padding:12px 14px;margin-bottom:8px;
}
.rank-row.me{background:var(--primary-tint);border:1.5px solid var(--primary)}
.rank-pos{
  flex:none;width:34px;height:34px;border-radius:50%;
  background:#edf2f1;color:var(--muted);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.9rem;font-family:var(--font-display);
}
.rank-pos.gold{background:var(--gold-tint);color:var(--gold)}
.rank-pos.silver{background:#eef1f4;color:#64748b}
.rank-pos.bronze{background:#fbe8da;color:var(--accent)}
.rank-ava{
  flex:none;width:40px;height:40px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;
}
.rank-row .who{flex:1;min-width:0}
.rank-row .who b{display:block;font-size:.93rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-row .who span{font-size:.78rem;color:var(--muted)}
.rank-pts{font-weight:700;color:var(--primary-dark);font-variant-numeric:tabular-nums}

/* ---------- bottom nav ---------- */
#tabs{
  position:sticky;bottom:0;z-index:10;
  display:flex;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-top:1px solid var(--line);
  padding:6px 4px calc(8px + env(safe-area-inset-bottom));
}
#tabs button{
  flex:1;border:none;background:none;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:.68rem;font-weight:600;color:var(--faint);
  padding:6px 2px;border-radius:10px;font-family:var(--font-body);
}
#tabs button .ico{font-size:1.25rem;line-height:1}
#tabs button.active{color:var(--primary-dark)}

/* ---------- mock test ---------- */
.testbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:8px 12px;margin-bottom:10px;box-shadow:var(--shadow)}
.timer{font-weight:700;font-size:1.15rem;color:var(--primary-dark);font-variant-numeric:tabular-nums;letter-spacing:.5px}
.timer.danger{color:#c0392b;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.45}}
.btn.sm{padding:8px 12px;font-size:.82rem;width:auto;margin:0;flex:none}
.opt.sel{border-color:var(--primary);background:var(--primary-tint);box-shadow:0 0 0 1px var(--primary)}
.row{display:flex;gap:8px;flex-wrap:wrap}
.row .btn{flex:1;margin:0;min-width:0}
.btn:disabled{opacity:.4;cursor:default}
.pal-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:6px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:10px;margin-bottom:8px}
.pal{aspect-ratio:1;border:1px solid var(--line);background:#eef2f1;border-radius:8px;font-size:.72rem;font-weight:600;color:#64748b;cursor:pointer;padding:0;min-width:0;font-family:var(--font-body)}
.pal.ans{background:#dcfce7;border-color:#16a34a;color:#166534}
.pal.cur{outline:2px solid var(--primary);outline-offset:1px}
.big-score{
  font-family:var(--font-display);font-size:2.6rem;font-weight:650;
  margin:6px 0;line-height:1;
}
.big-score span{font-size:1.1rem;font-weight:500;color:#a9d8d4}