:root{--jb-blue:#007AFF;--jb-blue-text:#0063D1;--jb-blue-dark:#0050A8;--jb-blue-light:#4DA3FF;--jb-blue-pale:#E8F2FF;--jb-bg-dark:#0A1628;--jb-amber:#f59e0b;--jb-amber-text:#92400e;--jb-success:#10b981;--jb-success-text:#15803d;--jb-danger:#ef4444;--jb-danger-text:#b91c1c;--jb-text:#0f172a;--jb-text-soft:#334155;--jb-muted:#475569;--jb-muted-soft:#64748b}.jamb-page *:focus-visible{outline:2px solid var(--jb-blue);outline-offset:2px;border-radius:4px}.jb-skip{position:absolute;left:-9999px;top:0;z-index:9999;background:var(--jb-text);color:#fff;padding:10px 18px;border-radius:0 0 8px 0;font-weight:600;text-decoration:none}.jb-skip:focus{left:0;outline:3px solid var(--jb-amber);outline-offset:0}.jb-sr-only{position:absolute !important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.jamb-page{font-family:'DM Sans',system-ui,sans-serif;background:#F8FAFD;color:var(--jb-text);margin:0;-webkit-font-smoothing:antialiased}.jamb-page *{box-sizing:border-box}.jamb-page a{text-decoration:none;color:inherit}.jb-wrap{max-width:1100px;margin:0 auto;padding:0 20px}.jb-bc{font-size:.78rem;font-weight:500;color:#475569;letter-spacing:.01em;padding:16px 0}.jb-bc a{color:#475569;text-decoration:underline;text-decoration-color:transparent;transition:text-decoration-color .15s ease}.jb-bc a:hover{color:var(--jb-blue-text);text-decoration-color:currentColor}.jb-bc .sep{margin:0 10px;color:#94a3b8}.jb-bc .cur{color:#0f172a;font-weight:600}.jb-hero{background:linear-gradient(135deg,#0A1628 0%,#1e3a5f 50%,#0063D1 100%);padding:56px 0 64px;position:relative;overflow:hidden;color:#fff}.jb-hero::before{content:'';position:absolute;inset:0;background-image:radial-gradient(circle at 20% 30%,rgba(77,163,255,.15),transparent 50%),radial-gradient(circle at 80% 70%,rgba(245,158,11,.08),transparent 40%);pointer-events:none}.jb-hero-z{position:relative;z-index:1}.jb-hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:100px;font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#fff;margin-bottom:18px}.jb-hero-tag .pulse{width:8px;height:8px;border-radius:50%;background:var(--jb-amber);animation:jbPulse 2s ease-in-out infinite}@keyframes jbPulse{0%,100%{opacity:1}50%{opacity:.4}}.jb-hero h1{font-size:clamp(1.85rem,5vw,3rem);font-weight:800;line-height:1.05;letter-spacing:-.025em;margin:0 0 14px}.jb-hero h1 b{color:var(--jb-amber);font-weight:800}.jb-hero p.sub{font-size:1rem;color:rgba(255,255,255,.85);line-height:1.6;max-width:640px;margin:0 0 24px}.jb-countdown{display:inline-flex;gap:14px;margin:8px 0 24px;flex-wrap:wrap}.jb-cd-box{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:12px;padding:12px 16px;text-align:center;min-width:72px}.jb-cd-num{font-size:1.6rem;font-weight:800;color:#fff;line-height:1}.jb-cd-lbl{font-size:.58rem;font-weight:700;color:rgba(255,255,255,.7);text-transform:uppercase;letter-spacing:.08em;margin-top:6px}.jb-cta-row{display:flex;gap:10px;flex-wrap:wrap}.jb-btn{display:inline-flex;align-items:center;gap:8px;padding:13px 24px;border-radius:100px;font-weight:600;font-size:.9rem;transition:background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;cursor:pointer;border:1px solid transparent;font-family:inherit;text-decoration:none;line-height:1}.jb-btn-primary{background:#f59e0b;color:#1a0f00;border-color:#f59e0b;box-shadow:0 1px 2px rgba(245,158,11,0.15),0 4px 12px -2px rgba(245,158,11,0.25)}.jb-btn-primary:hover{background:#fbbf24;border-color:#fbbf24;transform:translateY(-1px);box-shadow:0 2px 4px rgba(245,158,11,0.2),0 6px 18px -2px rgba(245,158,11,0.35)}.jb-btn-primary:active{transform:translateY(0)}.jb-btn-ghost{background:rgba(255,255,255,0.08);color:#fff;border-color:rgba(255,255,255,0.18);backdrop-filter:blur(4px)}.jb-btn-ghost:hover{background:rgba(255,255,255,0.14);border-color:rgba(255,255,255,0.25)}.jb-btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(59,130,246,0.4)}.jb-hero-stats{display:flex;gap:30px;margin-top:30px;flex-wrap:wrap}.jb-hs-num{font-size:1.8rem;font-weight:800;color:var(--jb-amber);line-height:1}.jb-hs-lbl{font-size:.62rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.6);margin-top:6px}.jb-sec{padding:56px 0}.jb-sec-alt{background:#fff}.jb-sec h2{font-size:clamp(1.5rem,2.8vw,1.95rem);font-weight:800;letter-spacing:-.022em;margin:0 0 10px;color:#0f172a}.jb-sec p.lead{font-size:.95rem;color:var(--jb-muted);max-width:620px;margin:0 0 30px;line-height:1.6}.jb-eyebrow{display:inline-flex;align-items:center;font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--jb-blue-dark);background:var(--jb-blue-pale);padding:6px 13px;border-radius:100px;margin-bottom:14px}.jb-tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}.jb-tool{display:block;padding:22px;background:#fff;border:1px solid #e2e8f0;border-radius:16px;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease;position:relative;cursor:pointer;box-shadow:0 1px 2px rgba(15,23,42,0.04)}.jb-tool:hover{border-color:#cbd5e1;transform:translateY(-2px);box-shadow:0 6px 20px -4px rgba(15,23,42,0.08),0 2px 6px -2px rgba(15,23,42,0.04)}.jb-tool:focus-visible{outline:none;border-color:var(--jb-blue);box-shadow:0 0 0 3px rgba(0,122,255,0.18)}.jb-tool.featured{background:#fff;border:1px solid #cbd5e1;box-shadow:0 1px 2px rgba(15,23,42,0.04),inset 0 0 0 1px rgba(0,122,255,0.12)}.jb-tool.featured:hover{border-color:var(--jb-blue);box-shadow:0 10px 28px -6px rgba(0,122,255,0.18),0 3px 8px -2px rgba(0,122,255,0.08)}.jb-tool-icon{width:46px;height:46px;background:#f1f5f9;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;margin-bottom:14px;transition:background-color .18s ease,color .18s ease}.jb-tool:hover .jb-tool-icon{background:var(--jb-blue-pale)}.jb-tool.featured .jb-tool-icon{background:var(--jb-blue);color:#fff}.jb-tool-name{font-size:1rem;font-weight:700;color:#0f172a;margin-bottom:5px;letter-spacing:-0.01em}.jb-tool-desc{font-size:.82rem;color:var(--jb-muted);line-height:1.6}.jb-tool-badge{position:absolute;top:16px;right:16px;font-size:.58rem;font-weight:700;letter-spacing:.06em;padding:4px 9px;border-radius:100px;background:#fef3c7;color:#92400e;text-transform:uppercase}.jb-stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:32px}.jb-stat{background:#fff;border:1px solid #e2e8f0;border-radius:14px;padding:22px 18px;text-align:center;box-shadow:0 1px 2px rgba(15,23,42,0.04);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.jb-stat:hover{border-color:#cbd5e1;transform:translateY(-1px);box-shadow:0 4px 12px -2px rgba(15,23,42,0.06)}.jb-stat-num{font-size:2rem;font-weight:800;color:var(--jb-blue-dark);letter-spacing:-.025em;line-height:1}.jb-stat-lbl{font-size:.74rem;color:var(--jb-muted);margin-top:6px;font-weight:600;letter-spacing:.01em}.cbt-shell{min-height:100vh;background:#f1f5f9;display:flex;flex-direction:column}.cbt-header{background:#0f172a;color:#fff;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}.cbt-brand{font-size:.8rem;font-weight:800;letter-spacing:.05em}.cbt-brand b{color:var(--jb-amber)}.cbt-timer{background:#1e293b;padding:8px 16px;border-radius:8px;font-family:'JetBrains Mono',monospace;font-size:1rem;font-weight:700;color:var(--jb-amber)}.cbt-timer.urgent{color:#ef4444;animation:jbPulse 1s infinite}.cbt-subjects{background:#1e293b;display:flex;overflow-x:auto;padding:0 12px}.cbt-subj{padding:14px 18px;font-size:.82rem;font-weight:600;color:rgba(255,255,255,.82);border:none;background:transparent;border-bottom:3px solid transparent;cursor:pointer;white-space:nowrap;transition:color .15s ease,background-color .15s ease,border-color .15s ease;font-family:inherit}.cbt-subj:hover{color:#fff;background:rgba(255,255,255,.06)}.cbt-subj:focus-visible{outline:2px solid var(--jb-amber);outline-offset:-2px}.cbt-subj.active,.cbt-subj[aria-selected="true"]{color:#fff;border-color:var(--jb-blue-light);background:rgba(77,163,255,.12)}.cbt-body{flex:1;display:grid;grid-template-columns:1fr 250px;gap:18px;padding:18px;max-width:1200px;margin:0 auto;width:100%}@media (max-width:768px){.cbt-body{grid-template-columns:1fr}.cbt-nav{order:-1}}.cbt-question-card{background:#fff;border-radius:14px;padding:28px;box-shadow:0 2px 12px rgba(15,23,42,.04)}.cbt-q-meta{display:flex;align-items:center;gap:10px;font-size:.72rem;color:var(--jb-muted);margin-bottom:14px}.cbt-q-num{background:var(--jb-blue-dark);color:#fff;padding:4px 10px;border-radius:6px;font-weight:700}.cbt-q-text{font-size:1.05rem;line-height:1.55;color:#0f172a;margin-bottom:22px;font-weight:500}.cbt-options{display:flex;flex-direction:column;gap:10px}.cbt-opt{display:flex;gap:14px;padding:14px 16px;background:#f8fafc;border:2px solid #e2e8f0;border-radius:10px;cursor:pointer;transition:border-color .15s ease,background-color .15s ease;min-height:44px;align-items:center}.cbt-opt:hover{border-color:var(--jb-blue-light);background:#fff}.cbt-opt:focus-visible{outline:none;border-color:var(--jb-blue-dark);box-shadow:0 0 0 3px rgba(0,99,209,0.25)}.cbt-opt[aria-checked="true"],.cbt-opt.selected{border-color:var(--jb-blue-dark);background:var(--jb-blue-pale)}.cbt-opt.correct{border-color:var(--jb-success);background:#d1fae5}.cbt-opt.wrong{border-color:var(--jb-danger);background:#fee2e2}.cbt-opt-label{width:28px;height:28px;background:#fff;border:1.5px solid #cbd5e1;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.78rem;flex-shrink:0}.cbt-opt.selected .cbt-opt-label{background:var(--jb-blue);color:#fff;border-color:var(--jb-blue)}.cbt-opt.correct .cbt-opt-label{background:var(--jb-success);color:#fff;border-color:var(--jb-success)}.cbt-opt.wrong .cbt-opt-label{background:var(--jb-danger);color:#fff;border-color:var(--jb-danger)}.cbt-opt-text{flex:1;font-size:.92rem;line-height:1.5;color:#1e293b}.cbt-actions{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap}.cbt-actions button{padding:11px 20px;border:none;border-radius:8px;font-weight:700;font-size:.85rem;cursor:pointer;font-family:inherit;transition:all .15s}.cbt-prev{background:#f1f5f9;color:#475569}.cbt-prev:hover{background:#e2e8f0}.cbt-next{background:var(--jb-blue);color:#fff}.cbt-next:hover{background:var(--jb-blue-dark)}.cbt-mark{background:#fef3c7;color:#92400e}.cbt-submit{background:var(--jb-success);color:#fff}.cbt-nav{background:#fff;border-radius:14px;padding:18px;height:fit-content;position:sticky;top:18px;box-shadow:0 2px 12px rgba(15,23,42,.04)}.cbt-nav h3{font-size:.8rem;font-weight:700;margin:0 0 12px;color:var(--jb-muted);text-transform:uppercase;letter-spacing:.06em}.cbt-nav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}.cbt-nav-cell{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:6px;font-size:.72rem;font-weight:600;cursor:pointer;transition:all .12s}.cbt-nav-cell:hover{background:var(--jb-blue-pale);border-color:var(--jb-blue-dark)}.cbt-nav-cell:focus-visible{outline:2px solid var(--jb-blue-dark);outline-offset:2px;z-index:1}.cbt-nav-cell.answered{background:var(--jb-blue-pale);color:var(--jb-blue-dark);border-color:var(--jb-blue-light);font-weight:700}.cbt-nav-cell.current{background:var(--jb-blue-dark);color:#fff;border-color:var(--jb-blue-dark);font-weight:700}.cbt-nav-cell.marked{background:#fef3c7;color:#92400e;border-color:#fde68a}.jb-tutor{display:flex;flex-direction:column;height:100%;background:#fff;border-radius:14px;border:1.5px solid #e2e8f0;overflow:hidden}.jb-msg-list{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:12px}.jb-msg{max-width:85%;padding:12px 16px;border-radius:14px;font-size:.88rem;line-height:1.55}.jb-msg.user{align-self:flex-end;background:var(--jb-blue);color:#fff;border-bottom-right-radius:4px}.jb-msg.bot{align-self:flex-start;background:#f1f5f9;color:#0f172a;border-bottom-left-radius:4px}.jb-msg.bot.typing{color:var(--jb-muted);font-style:italic}.jb-input-bar{display:flex;gap:8px;padding:14px;border-top:1px solid #e2e8f0;background:#fff}.jb-input-bar input{flex:1;padding:12px 14px;border:1.5px solid #e2e8f0;border-radius:10px;font-family:inherit;font-size:.9rem;outline:none}.jb-input-bar input:focus{border-color:var(--jb-blue)}.jb-input-bar button{padding:12px 22px;background:var(--jb-blue);color:#fff;border:none;border-radius:10px;font-weight:700;cursor:pointer}.jb-footer-cta{background:#0a1628;background-image:radial-gradient(circle at 20% 10%,rgba(59,130,246,0.22),transparent 50%),radial-gradient(circle at 80% 100%,rgba(245,158,11,0.12),transparent 50%);color:#fff;text-align:center;padding:64px 28px;border-radius:20px;margin:40px 0;position:relative;overflow:hidden}.jb-footer-cta h3{font-size:1.55rem;font-weight:700;margin:0 0 12px;letter-spacing:-0.02em;color:#fff}.jb-footer-cta p{color:rgba(255,255,255,0.72);font-size:.94rem;max-width:520px;margin:0 auto 24px;line-height:1.65}@media (max-width:600px){.jb-hero{padding:40px 0 48px}.jb-sec{padding:36px 0}.jb-tool{padding:16px}.cbt-question-card{padding:18px}.cbt-q-text{font-size:1rem}.cbt-opt{padding:12px}}@media (max-width:820px){.jamb-page .jb-btn,.jamb-page .cbt-subj,.jamb-page .cbt-actions button,.jamb-page .jb-input-bar button{min-height:44px;padding-top:12px!important;padding-bottom:12px!important;font-size:1rem!important;display:inline-flex;align-items:center;justify-content:center}.jamb-page .jb-input-bar input,.jamb-page .inp{font-size:16px!important;min-height:44px;padding-top:12px!important;padding-bottom:12px!important}.jamb-page .cbt-opt{min-height:44px;padding-top:12px!important;padding-bottom:12px!important}}