:root{--jss-blue:#1a6bff;--jss-blue-dk:#0f4fd6;--jss-blue-lt:#eff5ff;--jss-blue-md:#d0e3ff;--jss-green:#16a34a;--jss-green-lt:#f0fdf4;--jss-amber:#d97706;--jss-amber-lt:#fffbeb;--jss-red:#dc2626;--jss-red-lt:#fef2f2;--jss-purple:#7c3aed;--jss-purple-lt:#f5f3ff;--jss-cyan:#0891b2;--jss-cyan-lt:#ecfeff;--ink:#0f172a;--ink-2:#1e293b;--ink-3:#334155;--muted:#64748b;--muted-2:#94a3b8;--border:#e2e8f0;--border-dk:#cbd5e1;--bg:#f8fafc;--surface:#fff;--font-body:"Inter",system-ui,sans-serif;--font-display:"Plus Jakarta Sans","Inter",system-ui,sans-serif;--r-sm:6px;--r:12px;--r-lg:20px;--r-xl:28px;--shadow-xs:0 1px 2px #0000000d;--shadow-sm:0 1px 3px #00000014,0 1px 2px #0000000a;--shadow:0 4px 16px #00000014,0 1px 3px #0000000a;--shadow-lg:0 10px 30px #0000001a,0 3px 8px #0000000d;--sidebar-w:264px;--topnav-h:64px;--mobile-nav-h:60px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-body);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}img{max-width:100%;height:auto}button{cursor:pointer;background:0 0;border:none;outline:none;font-family:inherit}a{color:inherit;text-decoration:none}input,select,textarea{font-family:inherit}ul{list-style:none}#topnav{height:var(--topnav-h);background:var(--surface);border-bottom:1px solid var(--border);z-index:200;align-items:center;gap:16px;padding:0 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#ef444400}}.btn-live:hover{background:#dc2626}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:20px}.card-sm{padding:14px}.card-lg{padding:28px}.card:hover.hoverable{box-shadow:var(--shadow);border-color:var(--jss-blue-md);transition:all .2s;transform:translateY(-1px)}.card.hoverable{cursor:pointer;transition:all .2s}.pill{border-radius:99px;align-items:center;gap:4px;padding:3px 9px;font-size:11px;font-weight:700;display:inline-flex}.pill-blue{background:var(--jss-blue-lt);color:var(--jss-blue)}.pill-green{background:var(--jss-green-lt);color:var(--jss-green)}.pill-red{background:var(--jss-red-lt);color:var(--jss-red)}.pill-amber{background:var(--jss-amber-lt);color:var(--jss-amber)}.pill-purple{background:var(--jss-purple-lt);color:var(--jss-purple)}.pill-gray{background:var(--bg);color:var(--muted);border:1px solid var(--border)}.live-pulse{align-items:center;gap:5px;display:flex}.live-dot{background:#ef4444;border-radius:50%;width:7px;height:7px;animation:1.5s infinite livePulse}@keyframes livePulse{0%,to{opacity:1}50%{opacity:.3}}.grid-2{grid-template-columns:1fr 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var(--border)}.course-desc{color:var(--muted);margin-bottom:14px;font-size:13px;line-height:1.55}.course-price{font-family:var(--font-display);color:var(--ink);margin-bottom:12px;font-size:22px;font-weight:800}.course-price span{color:var(--muted);font-size:13px;font-weight:500}.course-card-footer{border-top:1px solid var(--border);background:var(--bg);padding:14px 20px}.course-enroll-btn{width:100%}.enrolled-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);cursor:pointer;transition:all .2s;overflow:hidden}.enrolled-card:hover{box-shadow:var(--shadow);border-color:var(--jss-blue-md);transform:translateY(-2px)}.enrolled-card-top{align-items:flex-start;gap:14px;padding:18px 20px 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var(--border);border-radius:var(--r-lg);cursor:pointer;padding:20px;transition:all .2s}.exam-card:hover{box-shadow:var(--shadow);border-color:var(--jss-blue-md);transform:translateY(-2px)}.exam-card-top{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:12px;display:flex}.exam-icon{border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:20px;display:flex}.exam-name{font-family:var(--font-display);color:var(--ink);margin-bottom:2px;font-size:15px;font-weight:800}.exam-subject{color:var(--muted);font-size:12px;font-weight:500}.exam-meta{flex-wrap:wrap;gap:12px;margin-bottom:14px;display:flex}.exam-meta-item{color:var(--muted);align-items:center;gap:5px;font-size:12px;font-weight:500;display:flex}.mcq-question-block{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);margin-bottom:12px;padding:20px}.mcq-q-num{color:var(--jss-blue);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;font-size:11px;font-weight:700}.mcq-q-text{color:var(--ink);margin-bottom:14px;font-size:15px;font-weight:600;line-height:1.5}.mcq-option{border:1.5px solid var(--border);border-radius:var(--r-sm);cursor:pointer;color:var(--ink-3);align-items:center;gap:12px;margin-bottom:8px;padding:11px 14px;font-size:14px;font-weight:500;transition:all .15s;display:flex}.mcq-option:hover,.mcq-option.selected{border-color:var(--jss-blue);background:var(--jss-blue-lt);color:var(--jss-blue)}.mcq-option.correct{border-color:var(--jss-green);background:var(--jss-green-lt);color:var(--jss-green)}.mcq-option.wrong{border-color:var(--jss-red);background:var(--jss-red-lt);color:var(--jss-red)}.mcq-radio{border:2px solid var(--border);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:18px;height:18px;transition:all 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1fr;gap:14px;display:grid}.form-hint{color:var(--muted);margin-top:4px;font-size:12px}.modal-overlay{z-index:500;opacity:0;pointer-events:none;background:#00000073;justify-content:center;align-items:center;padding:20px;transition:opacity .25s;display:flex;position:fixed;inset:0}.modal-overlay.open{opacity:1;pointer-events:all}.modal-box{background:var(--surface);border-radius:var(--r-xl);width:100%;max-width:520px;max-height:90vh;transition:transform .3s cubic-bezier(.32,.72,0,1);overflow-y:auto;transform:scale(.95)translateY(10px)}.modal-overlay.open .modal-box{transform:scale(1)translateY(0)}.modal-box::-webkit-scrollbar{display:none}.modal-hdr{justify-content:space-between;align-items:flex-start;padding:24px 28px 0;display:flex}.modal-title{font-family:var(--font-display);color:var(--ink);font-size:19px;font-weight:800}.modal-sub{color:var(--muted);margin-top:3px;font-size:13px;font-weight:500}.modal-close{width:30px;height:30px;color:var(--muted);cursor:pointer;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:18px;transition:all .15s;display:flex}.modal-close:hover{background:var(--bg);color:var(--ink)}.modal-body{padding:20px 28px}.modal-footer{border-top:1px solid var(--border);justify-content:flex-end;gap:10px;padding:16px 28px 24px;display:flex}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);align-items:center;gap:14px;padding:18px 20px;display:flex}.stat-icon{border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:22px;display:flex}.stat-val{font-family:var(--font-display);color:var(--ink);margin-bottom:2px;font-size:26px;font-weight:800;line-height:1}.stat-label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:11px;font-weight:600}.notif-item{border-bottom:1px solid var(--border);cursor:pointer;gap:12px;padding:14px 0;display:flex}.notif-item:last-child{border-bottom:none}.notif-item:hover .notif-text{color:var(--jss-blue)}.notif-dot{background:var(--jss-blue);border-radius:50%;flex-shrink:0;width:8px;height:8px;margin-top:6px}.notif-dot.read{background:var(--border)}.notif-text{color:var(--ink-3);flex:1;font-size:14px;font-weight:500;line-height:1.5}.notif-time{color:var(--muted-2);margin-top:3px;font-size:11px}.doubt-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);align-items:flex-start;gap:14px;margin-bottom:10px;padding:16px 20px;display:flex}.doubt-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;font-size:18px;display:flex}.note-file-row{background:var(--bg);border:1px solid var(--border);border-radius:var(--r-sm);cursor:pointer;align-items:center;gap:12px;margin-bottom:8px;padding:12px 16px;transition:all .15s;display:flex}.note-file-row:hover{border-color:var(--jss-blue);background:var(--jss-blue-lt)}.toast-container{z-index:9999;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:28px;right:28px}.toast{background:var(--ink);color:#fff;border-radius:var(--r);max-width:360px;box-shadow:var(--shadow-lg);align-items:center;gap:9px;padding:12px 20px;font-size:13px;font-weight:600;animation:.3s cubic-bezier(.16,1,.3,1) forwards slideIn;display:flex}.toast-ok{background:var(--jss-green)}.toast-warn{background:var(--jss-amber)}.toast-err{background:var(--jss-red)}.toast-info{background:var(--jss-blue)}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.filter-row{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:20px;display:flex}.filter-search{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--r-sm);flex:1;align-items:center;gap:8px;max-width:280px;padding:8px 14px;transition:border-color .2s;display:flex}.filter-search:focus-within{border-color:var(--jss-blue)}.filter-search i{color:var(--muted-2);flex-shrink:0;font-size:16px}.filter-search input{color:var(--ink);background:0 0;border:none;outline:none;flex:1;font-size:13px}.filter-select{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--r-sm);color:var(--ink);cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");background-position:right 10px center;background-repeat:no-repeat;outline:none;padding:8px 30px 8px 14px;font-size:13px;transition:border-color .2s}.filter-select:focus{border-color:var(--jss-blue)}.tab-pills{background:var(--bg);border-radius:var(--r-sm);gap:4px;width:fit-content;margin-bottom:20px;padding:4px;display:flex}.tab-pill{border-radius:var(--r-sm);color:var(--muted);cursor:pointer;white-space:nowrap;padding:7px 16px;font-size:13px;font-weight:600;transition:all .15s}.tab-pill.active{background:var(--surface);color:var(--jss-blue);box-shadow:var(--shadow-xs)}.back-row{align-items:center;gap:12px;margin-bottom:20px;display:flex}.back-btn{color:var(--muted);cursor:pointer;border-radius:var(--r-sm);align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:600;transition:all .15s;display:flex}.back-btn:hover{background:var(--bg);color:var(--ink)}.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);overflow:hidden}table{border-collapse:collapse;width:100%}thead th{background:var(--bg);text-align:left;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border);white-space:nowrap;padding:10px 16px;font-size:11px;font-weight:700}tbody td{border-bottom:1px solid var(--border);color:var(--ink-2);vertical-align:middle;padding:12px 16px;font-size:13px}tbody tr:last-child td{border-bottom:none}tbody tr:hover td{background:var(--bg)}tbody tr{cursor:pointer}.upload-zone{border:2px dashed var(--border-dk);border-radius:var(--r);text-align:center;cursor:pointer;background:var(--bg);padding:28px;transition:all .2s}.upload-zone:hover{border-color:var(--jss-blue);background:var(--jss-blue-lt)}.upload-zone i{color:var(--muted-2);margin-bottom:8px;font-size:32px}.upload-zone p{color:var(--muted);margin-bottom:4px;font-size:14px;font-weight:500}.upload-zone span{color:var(--jss-blue);font-size:12px;font-weight:600}#mobile-nav{height:var(--mobile-nav-h);background:var(--surface);border-top:1px solid var(--border);z-index:200;justify-content:space-around;align-items:center;padding:0 4px;display:none;position:fixed;bottom:0;left:0;right:0}.mob-nav-item{border-radius:var(--r-sm);cursor:pointer;flex-direction:column;flex:1;align-items:center;gap:2px;padding:6px 10px;transition:all .15s;display:flex}.mob-nav-item:hover{background:var(--bg)}.mob-nav-item.active{color:var(--jss-blue)}.mob-nav-item i{font-size:20px}.mob-nav-item span{color:inherit;font-size:10px;font-weight:600}.loading-spinner{border:3px solid var(--border);border-top-color:var(--jss-blue);border-radius:50%;width:32px;height:32px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=1024px){#sidebar{display:none}#sidebar.open{top:var(--topnav-h);z-index:150;width:260px;box-shadow:var(--shadow-lg);display:flex;position:fixed;bottom:0;left:0}.nav-hamburger{display:flex}#main{padding:20px}}@media (width<=768px){:root{--topnav-h:56px}.nav-search{display:none}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3,.grid-2,.grid-auto{grid-template-columns:1fr}.page-hdr{flex-direction:column;gap:12px}#main{padding:16px;padding-bottom:calc(var(--mobile-nav-h) + 16px)}#mobile-nav{display:flex}.nav-user-info{display:none}.pg-title{font-size:22px}.course-card-header{padding:16px}}@media (width<=480px){.grid-4{grid-template-columns:1fr 1fr}.form-row{grid-template-columns:1fr}.btn{padding:10px 16px;font-size:13px}}.react-main-layout{flex-direction:column;min-height:100vh;display:flex}