.cxu-fab{position:fixed;left:18px;bottom:22px;z-index:120;width:56px;height:56px;border:0;border-radius:18px;background:linear-gradient(135deg,#00a896,#7c5cff);color:#fff;font-size:25px;font-weight:900;box-shadow:0 16px 40px rgba(0,0,0,.22)}
.cxu-menu{position:fixed;left:18px;bottom:90px;z-index:121;width:min(420px,calc(100vw - 28px));max-height:min(78vh,680px);overflow:auto;padding:14px;border:1px solid var(--cx-line);border-radius:24px;background:color-mix(in srgb,var(--cx-surface) 97%,transparent);backdrop-filter:blur(22px);box-shadow:0 24px 70px rgba(0,0,0,.24)}
.cxu-menu-head{display:flex;align-items:center;justify-content:space-between;padding:4px 5px 12px}.cxu-menu-head button{border:0;background:transparent;font-size:24px;color:inherit}.cxu-menu-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.cxu-card{display:flex;align-items:center;gap:9px;text-align:right;padding:12px;border:1px solid var(--cx-line);background:var(--cx-surface-2);color:inherit;border-radius:15px;cursor:pointer}.cxu-card:hover{transform:translateY(-1px)}.cxu-card .cxu-icon{font-size:20px}.cxu-card span:nth-child(2){display:grid;gap:2px;flex:1}.cxu-card small{font-size:10px;color:var(--cx-muted)}.cxu-card i{font-style:normal;color:var(--cx-muted)}
.cxu-mobile-nav{display:none}.cxu-overlay{position:fixed;inset:0;z-index:200;background:rgba(3,10,18,.62);display:grid;place-items:center;padding:18px}.cxu-modal{width:min(720px,100%);max-height:90vh;overflow:auto;background:var(--cx-surface);color:var(--cx-text);border:1px solid var(--cx-line);border-radius:24px;box-shadow:0 30px 100px rgba(0,0,0,.35)}.cxu-modal header{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--cx-line)}.cxu-modal header div{display:grid;gap:3px}.cxu-modal header small{color:var(--cx-muted);font-size:10px}.cxu-modal header button{border:0;background:transparent;color:inherit;font-size:26px}.cxu-body{padding:20px}.cxu-modal footer{padding:14px 20px;border-top:1px solid var(--cx-line);display:flex;justify-content:flex-start}.cxu-hero{display:flex;gap:14px;align-items:flex-start;padding:16px;border-radius:18px;background:var(--cx-surface-2)}.cxu-hero>span{font-size:32px}.cxu-hero h3{margin:0 0 6px}.cxu-hero p{margin:5px 0;color:var(--cx-muted)}.cxu-grid,.cxu-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}.cxu-grid>div,.cxu-metrics>div{padding:14px;border:1px solid var(--cx-line);border-radius:15px;background:var(--cx-surface-2);color:var(--cx-muted);font-size:11px}.cxu-grid strong,.cxu-metrics strong{display:block;color:var(--cx-text);font-size:20px;margin-top:5px}.cxu-note{margin-top:14px;padding:12px;border-radius:14px;background:rgba(0,168,150,.08);font-size:12px}.cxu-path{display:grid;gap:8px}.cxu-step{display:flex;gap:12px;align-items:center;padding:13px;border:1px solid var(--cx-line);border-radius:15px}.cxu-step>span{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:var(--cx-surface-2);font-weight:900}.cxu-step.current{border-color:var(--cx-brand)}.cxu-step.done>span{background:var(--cx-brand);color:#fff}.cxu-step div{display:grid;gap:3px}.cxu-step small{color:var(--cx-muted)}.cxu-table{display:grid;gap:6px}.cxu-table>div{display:grid;grid-template-columns:34px 1fr auto auto;align-items:center;gap:8px;padding:11px;border:1px solid var(--cx-line);border-radius:12px}.cxu-table small{color:var(--cx-muted)}.cxu-search{margin-bottom:10px}.cxu-search input{width:100%;box-sizing:border-box}.cxu-bars{display:grid;gap:15px}.cxu-bars label{display:flex;justify-content:space-between;font-size:12px}.cxu-bars>div>div{height:10px;margin-top:6px;border-radius:99px;background:var(--cx-surface-2);overflow:hidden}.cxu-bars i{display:block;height:100%;background:linear-gradient(90deg,var(--cx-brand),var(--cx-violet));border-radius:inherit}.cxu-compare{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;text-align:center;gap:10px}.cxu-compare>div{padding:20px;border:1px solid var(--cx-line);border-radius:18px;background:var(--cx-surface-2)}.cxu-compare strong{display:block;font-size:34px;margin-top:6px}.cxu-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}.cxu-actions button{padding:13px;border:1px solid var(--cx-line);background:var(--cx-surface-2);color:inherit;border-radius:13px}.cxu-plans{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.cxu-plans>div{padding:18px;border:1px solid var(--cx-line);border-radius:18px;display:grid;gap:6px}.cxu-plans span{font-size:11px;color:var(--cx-muted)}.cxu-plans .active{border-color:var(--cx-brand);box-shadow:0 0 0 2px rgba(0,168,150,.12)}
@media(max-width:800px){.cxu-fab{left:12px;bottom:82px;width:50px;height:50px}.cxu-menu{left:10px;bottom:140px;width:calc(100vw - 20px)}.cxu-mobile-nav{display:flex;position:fixed;left:10px;right:10px;bottom:10px;z-index:119;height:64px;border:1px solid var(--cx-line);border-radius:20px;background:color-mix(in srgb,var(--cx-surface) 96%,transparent);backdrop-filter:blur(20px);box-shadow:0 15px 50px rgba(0,0,0,.18);overflow-x:auto}.cxu-mobile-nav button{min-width:78px;flex:1;border:0;background:transparent;color:inherit;display:grid;place-items:center;align-content:center;gap:2px;font-size:18px}.cxu-mobile-nav span{font-size:10px}.cxu-grid,.cxu-metrics,.cxu-plans{grid-template-columns:1fr 1fr}.cxu-table>div{grid-template-columns:30px 1fr auto}.cxu-table small{display:none}}
@media(prefers-reduced-motion:reduce){.cxu-card{transition:none!important}}

/* Professional Exam Builder */
.exam-builder-pro{display:flex;flex-direction:column;gap:18px}.exam-builder-section{border:1px solid var(--border,#e5e7eb);border-radius:16px;padding:16px;background:var(--surface,#fff)}.exam-builder-pro .field.full{grid-column:1/-1}.exam-builder-pro .question-picker{max-height:280px;overflow:auto}.exam-builder-pro .question-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin-top:14px}.exam-answer-input{margin-top:10px}.exam-question h3{line-height:1.9}.exam-builder-pro .anti-cheat-options{display:flex;flex-wrap:wrap;gap:10px}.exam-builder-pro .anti-cheat-options label{padding:8px 12px;border:1px solid var(--border,#e5e7eb);border-radius:10px;background:var(--surface-2,#f8fafc)}
@media(max-width:700px){.exam-builder-section{padding:12px}.exam-builder-pro .form-grid{grid-template-columns:1fr}.exam-builder-pro .field.full{grid-column:auto}.exam-builder-pro .question-grid{grid-template-columns:1fr}.exam-builder-pro .anti-cheat-options{display:grid;grid-template-columns:1fr}.exam-question{padding:12px}.exam-question .exam-option{min-height:48px;display:flex;align-items:center;gap:8px}}

/* Login isolation: never show authenticated/mobile navigation before login. */
body.cx-login-screen #cxUltimateNav, body.cx-login-screen #cxUltimateFab, body.cx-login-screen #cxUltimateMenu, body.cx-login-screen .cxu-overlay { display:none !important; }
body.cx-login-screen .sidebar, body.cx-login-screen .topbar { display:none !important; }