:root{--bg:#f7f8fc;--card:#fff;--ink:#0f172a;--muted:#5b6478;--line:#e4e7f0;--brand:#4f46e5;--brand2:#7c3aed;--accent:#f59e0b;--ok:#16a34a;--bad:#dc2626;--quant:#4f46e5;--reason:#0891b2;--dilr:#db2777;--varc:#059669;--cuet:#ea580c;--r:14px;--sh:0 6px 24px rgba(15,23,42,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--brand);text-decoration:none}img{max-width:100%}
.container{max-width:1160px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
h1,h2,h3{line-height:1.2;margin:0 0 .5em}h1{font-size:clamp(2rem,5vw,3.3rem);letter-spacing:-.02em}h2{font-size:clamp(1.5rem,3.2vw,2.2rem);letter-spacing:-.01em}
.btn{display:inline-block;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;padding:.8em 1.4em;border-radius:10px;font-weight:600;border:0;cursor:pointer;font-size:1rem;box-shadow:0 6px 18px rgba(79,70,229,.25);transition:transform .15s}
.btn:hover{transform:translateY(-1px)}.btn-sm{padding:.5em 1em;font-size:.9rem;box-shadow:none}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn:disabled{opacity:.5;cursor:not-allowed}
/* header */
#site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:.5em;font-weight:800;font-size:1.25rem;color:var(--ink)}
.logo-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;font-size:1.05rem}
.nav-links{display:flex;align-items:center;gap:1.1em}.nav-links a{color:var(--muted);font-weight:500;font-size:.95rem}
.nav-links a.active,.nav-links a:hover{color:var(--ink)}.nav-links a.btn{color:#fff}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;font-size:1.3rem;padding:.2em .55em;cursor:pointer}
@media(max-width:920px){.menu-btn{display:block}.nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--line);gap:.2em}.nav-links a{padding:.6em 0}.nav-open .nav-links{display:flex}}
/* hero */
.hero{padding:72px 0 56px;background:radial-gradient(1200px 500px at 85% -10%,#e0e7ff,transparent),radial-gradient(800px 400px at -10% 110%,#fce7f3,transparent)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.pill{display:inline-block;background:#eef2ff;color:var(--brand);font-weight:600;font-size:.85rem;padding:.35em .9em;border-radius:99px;margin-bottom:1em}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:560px}
.grad{background:linear-gradient(135deg,var(--brand),var(--dilr));-webkit-background-clip:text;background-clip:text;color:transparent}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:1.6em 0}
.stats{display:flex;gap:28px;flex-wrap:wrap}.stats b{display:block;font-size:1.5rem}.stats span{color:var(--muted);font-size:.9rem}
.hero-card{background:#fff;border-radius:18px;box-shadow:0 20px 50px rgba(15,23,42,.12);padding:22px;border:1px solid var(--line)}
.hero-card .q-meta{display:flex;justify-content:space-between;font-size:.85rem;color:var(--muted);margin-bottom:10px}
.timer-chip{background:#fef3c7;color:#92400e;font-weight:700;border-radius:8px;padding:.15em .6em}
.mini-opt{border:1px solid var(--line);border-radius:10px;padding:.55em .8em;margin:.45em 0;font-size:.95rem}.mini-opt.sel{border-color:var(--ok);background:#f0fdf4}
@media(max-width:860px){.hero-grid{grid-template-columns:1fr}.hero{padding:44px 0}}
/* sections */
section{padding:64px 0}.section-head{text-align:center;max-width:680px;margin:0 auto 36px}
.grid{display:grid;gap:20px}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh)}
.card h3{font-size:1.15rem}.icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:1.3rem;margin-bottom:12px;background:#eef2ff}
.sec-card{border-top:4px solid var(--c,var(--brand));display:flex;flex-direction:column}
.sec-card ul{padding-left:1.1em;color:var(--muted);margin:.4em 0 1.2em;flex:1}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:.6em 0 1em}.tag{font-size:.8rem;background:#f1f5f9;border-radius:99px;padding:.2em .7em;color:#334155}
.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:20px;padding:44px;text-align:center}.cta-band .btn{background:#fff;color:var(--brand)}
/* page header */
.page-head{padding:48px 0 28px;background:linear-gradient(180deg,#eef2ff,transparent)}
.breadcrumb{font-size:.9rem;color:var(--muted)}
.topic-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.topic{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}.topic h4{margin:0 0 .3em}.topic p{margin:0;color:var(--muted);font-size:.92rem}
.badge{font-size:.72rem;font-weight:700;padding:.15em .55em;border-radius:6px;background:#dcfce7;color:#166534;margin-left:.4em;vertical-align:middle}.badge.soon{background:#f1f5f9;color:#64748b}
.note h3{margin-top:1.4em}.formula{background:#0f172a;color:#e2e8f0;border-radius:12px;padding:18px 22px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92rem;overflow-x:auto}
.formula div{padding:.25em 0;border-bottom:1px dashed #334155}.formula div:last-child{border:0}
.tip{border-left:4px solid var(--accent);background:#fffbeb;padding:12px 16px;border-radius:8px;margin:1em 0}
table.data{border-collapse:collapse;width:100%;margin:.6em 0;font-size:.93rem;background:#fff}table.data th,table.data td{border:1px solid var(--line);padding:.45em .7em;text-align:center}table.data th{background:#f1f5f9}
/* footer */
#site-footer{background:#0f172a;color:#cbd5e1;padding:48px 0 20px;margin-top:40px}#site-footer .logo{color:#fff}#site-footer a{color:#cbd5e1;display:block;padding:.2em 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}#site-footer h4{color:#fff;margin:.2em 0 .6em}#site-footer .muted{color:#94a3b8}
.copyright{border-top:1px solid #1e293b;margin-top:28px;padding-top:16px;font-size:.85rem;color:#94a3b8}
@media(max-width:700px){.footer-grid{grid-template-columns:1fr 1fr}}
/* forms */
.form{display:grid;gap:14px}.form label{font-weight:600;font-size:.9rem}.form input,.form select,.form textarea{width:100%;padding:.75em .9em;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;margin-top:.3em}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid #c7d2fe;border-color:var(--brand)}
.notice{background:#eff6ff;border:1px solid #bfdbfe;color:#1e3a8a;padding:12px 14px;border-radius:10px;font-size:.92rem}
/* quiz */
.quiz-setup .sec-pick{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}@media(max-width:700px){.quiz-setup .sec-pick{grid-template-columns:1fr 1fr}}
.sec-pick label{border:2px solid var(--line);border-radius:12px;padding:14px;cursor:pointer;background:#fff;font-weight:600}.sec-pick input{display:none}.sec-pick label:has(input:checked){border-color:var(--brand);background:#eef2ff}
.quiz-wrap{display:grid;grid-template-columns:1fr 280px;gap:20px;align-items:start}@media(max-width:860px){.quiz-wrap{grid-template-columns:1fr}}
.quiz-bar{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.25rem;background:#fef3c7;color:#92400e;padding:.25em .8em;border-radius:10px}.timer.low{background:#fee2e2;color:#991b1b}
.progress{height:6px;background:#e2e8f0;border-radius:99px;overflow:hidden;margin-bottom:16px}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:width .3s}
.q-data{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin-bottom:14px;font-size:.93rem}
.q-text{font-size:1.08rem;font-weight:500;margin-bottom:14px}
.opt{display:flex;gap:12px;align-items:center;width:100%;text-align:left;border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:.8em 1em;margin:.5em 0;font:inherit;cursor:pointer;transition:.12s}
.opt:hover{border-color:#a5b4fc}.opt.sel{border-color:var(--brand);background:#eef2ff}.opt b{width:28px;height:28px;flex:none;border-radius:8px;background:#f1f5f9;display:grid;place-items:center;font-size:.85rem}.opt.sel b{background:var(--brand);color:#fff}
.opt.correct{border-color:var(--ok);background:#f0fdf4}.opt.wrong{border-color:var(--bad);background:#fef2f2}
.q-actions{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:16px}
.palette{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:12px 0}.palette button{aspect-ratio:1;border-radius:9px;border:1px solid var(--line);background:#fff;font-weight:600;cursor:pointer}
.palette .ans{background:#dcfce7;border-color:#86efac}.palette .mark{background:#fef3c7;border-color:#fcd34d}.palette .cur{outline:2px solid var(--brand)}
.legend{font-size:.8rem;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap}.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:4px;vertical-align:-1px}
.score-ring{width:140px;height:140px;border-radius:50%;display:grid;place-items:center;margin:0 auto 10px;background:conic-gradient(var(--ok) calc(var(--p)*1%),#e2e8f0 0)}.score-ring span{width:110px;height:110px;border-radius:50%;background:#fff;display:grid;place-items:center;font-size:1.6rem;font-weight:800}
.sol{background:#f8fafc;border-left:4px solid var(--brand);padding:10px 14px;border-radius:8px;margin-top:8px;font-size:.95rem}
.review-item{margin-bottom:18px}.hidden{display:none!important}
/* charts */
.bars{display:grid;gap:8px;margin:8px 0}.bar-row{display:grid;grid-template-columns:70px 1fr 40px;align-items:center;gap:8px;font-size:.88rem}.bar-row i{display:block;height:18px;border-radius:5px;background:linear-gradient(90deg,var(--dilr),#f472b6)}
.pie-wrap{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.pie{width:130px;height:130px;border-radius:50%}.pie-legend div{font-size:.88rem}.pie-legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px}
/* ===== v2 ===== */
svg.logo-mark{width:36px;height:36px;display:block;flex:none;background:none}
a.topic{display:block;color:inherit;transition:border-color .15s,transform .15s}a.topic:hover{border-color:#a5b4fc;transform:translateY(-1px)}
.soon-card{background:#f8fafc;border-style:dashed}.soon-list{margin:.3em 0 0;padding-left:1.1em;color:var(--muted)}.soon-list li{margin:.15em 0}
.setup-grid{grid-template-columns:repeat(4,1fr)}@media(max-width:900px){.setup-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){
  .hero{padding:32px 0 36px}.hero-grid{gap:28px}
  .pill{white-space:nowrap;font-size:.8rem}
  .hero-cta{flex-direction:column;align-items:stretch}.hero-cta .btn{width:100%;text-align:center}
  .stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stats b{font-size:1.25rem}.stats span{font-size:.78rem;line-height:1.3;display:block}
  .grid.m2{grid-template-columns:1fr 1fr;gap:12px}
  .compact .card{padding:14px}.compact .icon{width:34px;height:34px;font-size:1.05rem;margin-bottom:8px;border-radius:10px}
  .compact h3{font-size:.98rem;margin-bottom:.3em}.compact p,.compact .soon-list{font-size:.84rem;line-height:1.45;margin:0}
  section{padding:44px 0}.section-head{margin-bottom:24px}
  .cta-band{padding:30px 20px}
  .setup-grid{grid-template-columns:1fr}
}
#site-footer a.logo{display:flex}
/* ===== v3: formula sheets ===== */
.fs-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap;margin-bottom:18px}.fs-head h2{margin-bottom:.2em}.fs-head p{margin:0}
.fs-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.fs-card{background:#fff;border:1px solid var(--line);border-left:5px solid var(--c);border-radius:14px;box-shadow:var(--sh);overflow:hidden}
.fs-card summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;padding:12px 16px;background:color-mix(in srgb,var(--c) 9%,#fff);user-select:none}
.fs-card summary::-webkit-details-marker{display:none}
.fs-card summary::after{content:"▾";margin-left:6px;color:var(--c);font-size:1rem;transition:transform .2s}
.fs-card:not([open]) summary::after{transform:rotate(-90deg)}
.fs-ic{width:34px;height:34px;flex:none;border-radius:9px;display:grid;place-items:center;background:#fff;box-shadow:0 1px 3px rgba(15,23,42,.08);font-size:1.05rem}
.fs-t{font-weight:700;font-size:1.02rem;color:var(--ink);flex:1}
.fs-n{font-size:.75rem;font-weight:700;color:var(--c);background:#fff;border:1px solid color-mix(in srgb,var(--c) 30%,#fff);border-radius:99px;padding:.1em .6em}
.fs-list{margin:0;padding:12px 16px 14px 34px;display:grid;gap:10px}
.fs-list li{padding-left:2px}.fs-list li::marker{color:var(--c)}
code.fx{display:inline-block;font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88rem;line-height:1.5;color:color-mix(in srgb,var(--c) 75%,#0f172a);background:color-mix(in srgb,var(--c) 8%,#fff);border:1px solid color-mix(in srgb,var(--c) 22%,#fff);border-radius:7px;padding:.18em .55em;white-space:pre-wrap;word-break:break-word}
.fx-note{display:block;color:var(--muted);font-size:.86rem;line-height:1.45;margin-top:4px}
@media(max-width:860px){.fs-grid{grid-template-columns:1fr}}
@media(max-width:600px){.fs-list{padding:10px 12px 12px 28px}.fs-card summary{padding:10px 12px}code.fx{font-size:.84rem}}
.fs-grid{display:block;columns:2;column-gap:16px}.fs-card{break-inside:avoid;margin-bottom:16px;display:block}
@media(max-width:860px){.fs-grid{columns:1}}
/* ===== v4: exam tags, exam picker, CAT track ===== */
.clean{padding-left:1.1em;margin:.4em 0}.clean li{margin:.35em 0}
.exam-tag{display:inline-block;margin-top:.6em;font-size:.7rem;font-weight:700;letter-spacing:.02em;padding:.18em .6em;border-radius:99px;border:1px solid}
.tag-cuet{background:#fff7ed;color:#9a3412;border-color:#fed7aa}
.mx{display:inline-flex;flex-direction:column;vertical-align:middle;border-left:2px solid currentColor;border-right:2px solid currentColor;border-radius:5px;padding:2px 6px;margin:2px 3px;line-height:1.35}.mx-r{display:flex;gap:12px;justify-content:space-around}.mx-r>span{min-width:1.2em;text-align:center}
.det .mx{border-radius:0}
.cuet-band{background:linear-gradient(135deg,#fff7ed,#fffbeb)}
.tag-cat{background:#eef2ff;color:#3730a3;border-color:#c7d2fe}.tag-bank{background:#ecfeff;color:#155e75;border-color:#a5f3fc}.tag-both{background:#f5f3ff;color:#5b21b6;border-color:#ddd6fe}
.cat-sub{margin:1.4em 0 .6em;font-size:1.05rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
/* exam picker */
.exam-pick{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media(max-width:1000px){.exam-pick{grid-template-columns:1fr}}
.exam-card{display:flex;align-items:center;gap:16px;text-align:left;font:inherit;color:inherit;cursor:pointer;background:#fff;border:2px solid var(--line);border-left:6px solid var(--c);border-radius:16px;padding:22px;box-shadow:var(--sh);transition:transform .15s,border-color .15s}
.exam-card:hover{transform:translateY(-2px);border-color:var(--c)}
.exam-ic{font-size:2rem;width:58px;height:58px;flex:none;display:grid;place-items:center;border-radius:14px;background:#f1f5f9}
.exam-b{display:flex;flex-direction:column;gap:.25em;flex:1}.exam-b b{font-size:1.25rem}.exam-b small{color:var(--muted);font-size:.88rem;line-height:1.4}
.exam-b .exam-n{color:var(--ink);font-weight:600}.exam-go{font-size:1.4rem;color:var(--c);font-weight:700}
@media(max-width:700px){.exam-pick{grid-template-columns:1fr}.exam-card{padding:16px}}
/* home CAT band */
.cat-band{background:linear-gradient(135deg,#eef2ff,#fdf2f8)}
.cat-band-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:28px;align-items:center}
.cat-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cat-mini .card{display:flex;flex-direction:column;gap:.2em;color:inherit;padding:18px}.cat-mini .card>b{font-size:1.1rem;color:var(--brand)}.cat-mini span{color:var(--muted);font-size:.9rem}.cat-mini span b{color:var(--ink);font-size:1.3rem}
@media(max-width:860px){.cat-band-grid{grid-template-columns:1fr}}
/* CAT setup */
.sec-pick.two{grid-template-columns:1fr 1fr}.sec-pick.three{grid-template-columns:repeat(3,1fr)}
.sec-pick label span{display:flex;flex-direction:column}.sec-pick label small{font-weight:500;color:var(--muted);font-size:.84rem}
@media(max-width:600px){.sec-pick.two,.sec-pick.three{grid-template-columns:1fr}}
.compact-head{padding:28px 0 8px}
/* CAT quiz layout */
.c-layout{display:grid;grid-template-columns:1fr 270px;gap:16px;align-items:start}
.c-layout.has-pane{grid-template-columns:minmax(0,1.1fr) minmax(0,1fr) 250px}
.c-main{min-width:0}
.c-pane{position:sticky;top:78px;max-height:calc(100vh - 96px);display:flex;flex-direction:column;padding:0;overflow:hidden}
.c-pane-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);font-size:.85rem;background:#f8fafc}
.c-pane-body{overflow:auto;margin:0;border:0;border-radius:0;background:#fff;padding:14px 18px;font-size:.95rem;line-height:1.7}
.c-pane-body p{margin:0 0 .9em}
.c-side{position:sticky;top:78px}
.c-qhead{display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;font-size:.88rem;margin-bottom:12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.c-marks{margin-left:auto;color:var(--muted)}
.qtype{font-size:.72rem;font-weight:800;padding:.2em .6em;border-radius:6px;letter-spacing:.04em}
.qtype.mcq{background:#e0e7ff;color:#3730a3}.qtype.tita{background:#fef3c7;color:#92400e}
ul.clues{padding-left:1.2em;margin:.5em 0}ul.clues li{margin:.3em 0}
ol.pj{padding-left:1.6em;margin:.6em 0}ol.pj li{margin:.45em 0;padding-left:.2em}
blockquote.ps{margin:.6em 0;padding:10px 14px;border-left:4px solid var(--varc);background:#f0fdf4;border-radius:8px;font-weight:400}
td.miss{background:#fef9c3;color:#854d0e;font-weight:700}
.q-text table.data,.c-pane-body table.data{font-size:.88rem}
/* TITA */
.tita label{display:block;font-size:.9rem;color:var(--muted);margin-bottom:6px}
.tita-input{width:100%;max-width:280px;font:inherit;font-size:1.3rem;font-weight:700;letter-spacing:.08em;padding:.5em .7em;border:2px solid var(--line);border-radius:10px;font-variant-numeric:tabular-nums}
.tita-input:focus{outline:none;border-color:var(--brand)}
.keypad{display:grid;grid-template-columns:repeat(3,64px);gap:8px;margin-top:10px}
.keypad button{height:46px;border-radius:10px;border:1px solid var(--line);background:#f8fafc;font:inherit;font-weight:700;font-size:1.1rem;cursor:pointer}
.keypad button:hover{background:#eef2ff}.keypad button:active{transform:scale(.97)}
.keypad .wide{grid-column:span 3;font-size:.9rem;height:40px}
.keypad[aria-disabled=true]{opacity:.5;pointer-events:none}
/* feedback */
.fb{margin-top:14px;padding:10px 14px;border-radius:10px;font-weight:500}.fb.ok{background:#f0fdf4;border:1px solid #86efac;color:#166534}.fb.bad{background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.btn-check{background:linear-gradient(135deg,#059669,#0d9488)}
/* CAT palette */
.c-palette{grid-template-columns:repeat(5,1fr)}
.c-palette button{font-size:.85rem;position:relative}
.c-palette .nv,.lg.nv{background:#fff;border:1px solid #cbd5e1}
.c-palette .na,.lg.na{background:#fee2e2;border-color:#fca5a5;color:#991b1b}
.c-palette .a,.lg.a{background:#dcfce7;border-color:#4ade80;color:#166534}
.c-palette .m,.lg.m{background:#ede9fe;border-color:#a78bfa;color:#5b21b6;border-radius:50%}
.c-palette .am,.lg.am{background:#ede9fe;border-color:#a78bfa;color:#5b21b6;border-radius:50%;box-shadow:inset 0 -4px 0 #22c55e}
.c-palette .ok{box-shadow:inset 0 -4px 0 #16a34a}.c-palette .bad{box-shadow:inset 0 -4px 0 #dc2626}
.c-palette .cur{outline:2.5px solid var(--brand);outline-offset:1px}
.c-legend{display:grid;grid-template-columns:1fr 1fr;gap:6px 10px;font-size:.78rem;color:var(--muted)}
.c-legend span{display:flex;align-items:center;gap:5px}.c-legend b{color:var(--ink);margin-left:auto}
.lg{display:inline-block;width:14px;height:14px;border-radius:4px;border:1px solid;flex:none}.lg.m,.lg.am{border-radius:50%}
/* results */
.kpis{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin-top:10px}
.kpi{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:12px;display:flex;flex-direction:column}
.kpi b{font-size:1.25rem}.kpi span{font-size:.78rem;color:var(--muted)}
.kpi.main{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border:0}.kpi.main span{color:#e0e7ff}.kpi.main b{font-size:1.8rem}
@media(max-width:900px){.kpis{grid-template-columns:repeat(3,1fr)}}@media(max-width:520px){.kpis{grid-template-columns:1fr 1fr}}
.table-wrap{overflow-x:auto}
.topic-table td:last-child span{font-size:.75rem;font-weight:700;padding:.2em .6em;border-radius:99px;white-space:nowrap}
.tag-strong{background:#dcfce7;color:#166534}.tag-weak{background:#fee2e2;color:#991b1b}.tag-mid{background:#fef3c7;color:#92400e}.tag-na{background:#f1f5f9;color:#64748b}
details.rv-pane{margin:0 0 12px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 14px}
details.rv-pane summary{cursor:pointer;font-weight:600;color:var(--brand)}details.rv-pane .q-data{margin:10px 0 0}
/* CAT responsive */
@media(max-width:1100px){.c-layout.has-pane{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.c-layout.has-pane .c-side{grid-column:1/-1;position:static}}
@media(max-width:860px){
 .c-layout,.c-layout.has-pane{grid-template-columns:1fr}
 .c-pane{position:static;max-height:none}.c-pane-body{max-height:46vh}
 .c-side{position:static}.c-palette{grid-template-columns:repeat(8,1fr)}
}
@media(max-width:520px){.c-palette{grid-template-columns:repeat(6,1fr)}.keypad{grid-template-columns:repeat(3,1fr)}.c-marks{margin-left:0}}
/* VARC rules sheet (prose items) */
.fs-prose code.fx{white-space:normal}
@media(max-width:1060px){.menu-btn{display:block}.nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--line);gap:.2em}.nav-links a{padding:.6em 0}.nav-open .nav-links{display:flex}}
@media(min-width:861px){.c-legend{grid-template-columns:1fr}}
/* ===== v5: bold formulas on formula/rules sheets ===== */
code.fx,.fs-prose code.fx{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-weight:700;letter-spacing:0}
.fs-prose code.fx{white-space:normal;overflow-wrap:break-word;word-break:normal}
.fx-note{font-weight:400}
.fs-t{font-weight:800;font-size:1.1rem}
@media(max-width:600px){.fs-t{font-size:1.05rem}}
/* ===== v6: stop grid cards with tables from overflowing on phones ===== */
.grid>*{min-width:0}
@media(max-width:600px){.card>table.data{display:block;max-width:100%;overflow-x:auto}.card>table.data th,.card>table.data td{padding-left:.5em;padding-right:.5em}}
.footer-grid>div{min-width:0}#site-footer a{overflow-wrap:anywhere}#site-footer img.logo-mark{border-radius:9px}
#site-footer .logo span{white-space:nowrap}
/* ===== Phase 3: usability ===== */
body{font-size:16px}
.quick-card{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:18px;border-left:4px solid var(--brand)}
.quick-card>div{display:flex;flex-direction:column;gap:2px}.quick-card b{font-size:1.1rem}
.prog-card h3{margin:0}.prog-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.prog-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
.prog-kpis div{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:10px;text-align:center;display:flex;flex-direction:column}
.prog-kpis b{font-size:1.3rem}.prog-kpis span{font-size:.85rem;color:var(--muted)}
.prog-table td small{display:block;font-size:.78rem}
.q-report{margin-top:6px}
.report-link{display:inline-flex;align-items:center;min-height:44px;padding:0 4px;font-size:.9rem;color:var(--muted)}
.report-link:hover{color:#b91c1c}
.resume-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px}.resume-actions{display:flex;gap:8px}
.btn-share{background:#25D366!important;color:#fff!important;box-shadow:none}
button.mini-opt{display:block;width:100%;text-align:left;background:#fff;font:inherit;color:inherit;cursor:pointer;min-height:44px}
button.mini-opt:hover:not(:disabled){border-color:var(--brand);background:#eef2ff}
button.mini-opt:disabled{cursor:default}
.mini-opt.right{border-color:var(--ok);background:#f0fdf4;font-weight:600}.mini-opt.wrong{border-color:#ef4444;background:#fef2f2}
.sample-fb{margin-top:10px;font-size:.95rem;line-height:1.5}
.btn-sm{min-height:44px}
.btn,button,select,input[type=text],input:not([type]){min-height:44px}
.palette button{min-height:44px;min-width:44px}
.keypad .wide{height:44px}
.q-data,.sol{overflow-x:auto;max-width:100%}
.q-data table{min-width:max-content}
#site-footer a{min-height:32px}
@media(max-width:700px){
 .q-data,.sol,.mini-opt,.opt{font-size:1rem}
 #site-footer a{padding:.55em 0}
 .breadcrumb a{display:inline-block;padding:.6em 0}
 .prog-kpis b{font-size:1.1rem}
}
.quiz-wrap>*,.c-layout>*,.grid>*{min-width:0}
.nav-links a{min-height:44px;display:flex;align-items:center}
@media(min-width:1061px){.nav-links a:not(.btn){min-height:44px;display:inline-flex}}
.logo{min-height:44px}
.menu-btn{min-width:46px;min-height:46px}
#site-footer a{min-height:44px;display:flex;align-items:center;padding:0}
#change-track,.quiz-setup .muted a{display:inline-flex;align-items:center;min-height:44px}
.breadcrumb a{display:inline-flex;align-items:center;min-height:44px}
@media(max-width:700px){.footer-grid>div:first-child{grid-column:1/-1}.prog-table th,.prog-table td{padding-left:6px;padding-right:6px}}