:root{--bg-base:#06110d;--panel:#0a100dc7;--panel-solid:#101512;--panel-soft:#0c120fb8;--panel-hover:#0e1c14e0;--green:#00d555;--green-2:#0f8;--cyan:#00d5ff;--text:#fff;--muted:#ffffff9e;--line:#00d5552e;--line-soft:#ffffff14;--danger:#ff4d4f;--radius-lg:20px;--radius-md:14px;--shadow-main:0 22px 70px #0000006b, 0 0 34px #00d55514;--bg-overlay:#000000b8;--border-input:#ffffff1a;--input-bg:#1f1f1feb;--fc-sidebar-bg:#080e0cf2;--fc-main-bg:transparent}[data-theme=light]{--bg-base:#f0f4f8;--panel:#ffffffd9;--panel-solid:#fff;--panel-soft:#f5f7fae0;--panel-hover:#ebf5eef2;--green:#00c853;--green-2:#00a86b;--cyan:#09c;--text:#1a1a2e;--muted:#0000008c;--line:#00c85338;--line-soft:#00000014;--danger:#e53935;--shadow-main:0 8px 32px #0000001a, 0 0 12px #00c8530f;--bg-overlay:#00000059;--border-input:#0000001f;--input-bg:#ffffffeb;--fc-sidebar-bg:#f0f4f8f2;--fc-main-bg:transparent}[data-theme=light] html,[data-theme=light] body{background:radial-gradient(circle at 18% 18%, #00c85014, transparent 32%), radial-gradient(circle at 82% 42%, #0099cc0f, transparent 36%), var(--bg-base)}[data-theme=light] body:before{content:"";pointer-events:none;z-index:0;background-color:#0000;background-image:linear-gradient(#00c85309 1px,#0000 1px),linear-gradient(90deg,#00c85309 1px,#0000 1px);background-position:0 0,0 0;background-repeat:repeat,repeat;background-size:42px 42px;background-attachment:scroll,scroll;background-origin:padding-box,padding-box;background-clip:border-box,border-box;position:fixed;inset:0}[data-theme=light] .aurora{opacity:.08}[data-theme=light] .particle{background:var(--green-2);box-shadow:0 0 8px var(--green-2);opacity:0}[data-theme=light] .login-container{-webkit-backdrop-filter:blur(16px);background:#ffffffe0;border:1px solid #00c8532e;box-shadow:0 12px 40px #0000001a}[data-theme=light] .login-container:hover{border-color:#00c85366;box-shadow:0 16px 48px #00000026}[data-theme=light] .login-container input{color:var(--text);background:#ffffffeb;border:1px solid #0000001f}[data-theme=light] .login-container input:focus{background:#fff;border-color:#00c8538c;box-shadow:0 0 0 3px #00c8531a}[data-theme=light] .navbar{-webkit-backdrop-filter:blur(16px);background:#ffffffe0;border-bottom:1px solid #00c85329;box-shadow:0 2px 12px #0000000f}[data-theme=light] .navbar button{color:var(--danger);background:#ffffffe6;border:1px solid #e539354d}[data-theme=light] .navbar button:hover{background:#ffebebf2}[data-theme=light] .container{-webkit-backdrop-filter:blur(18px);background:#ffffffd1;border:1px solid #00c85324;box-shadow:0 8px 32px #00000014}[data-theme=light] h1,[data-theme=light] h2,[data-theme=light] h3,[data-theme=light] #form-title{color:var(--text)}[data-theme=light] .login-heading{text-shadow:none}[data-theme=light] .bottom-navbar{-webkit-backdrop-filter:blur(18px);background:#ffffffeb;border-top:1px solid #00c8532e;box-shadow:0 -4px 20px #0000000f}[data-theme=light] .bottom-nav-btn{color:#0000008c}[data-theme=light] 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.update-modal-box{color:var(--text);background:#fff;border:1px solid #00c8534d}[data-theme=light] .app-modal-message,[data-theme=light] .update-modal-message{color:#000000b8}[data-theme=light] .app-modal-overlay,[data-theme=light] #update-modal-overlay{background:#00000059}[data-theme=light] .app-modal-input{color:var(--text);background:#f5f7fa;border:1px solid #00000026}[data-theme=light] .app-modal-btn.secondary{color:#333;background:#f0f0f0;border:1px solid #0000001f}[data-theme=light] .app-modal-btn.secondary:hover{background:#e0e0e0}[data-theme=light] .quiz-collection{background:var(--fc-sidebar-bg);border-left:1px solid #0000000f}[data-theme=light] .quiz-collection-header{border-bottom:1px solid #0000000f}[data-theme=light] .quiz-collection-title{color:var(--text)}[data-theme=light] .history-item{background:#fffc;border:1px solid #0000000f}[data-theme=light] .history-item:hover{background:#f0f8f2e6;border-color:#00c85359}[data-theme=light] .history-item-title{color:var(--text)}[data-theme=light] .history-item-meta{color:#00000080}[data-theme=light] .history-actions .history-edit-btn,[data-theme=light] .history-actions .history-delete-btn{background:#ffffffd9;border:1px solid #00000014}[data-theme=light] .history-stats{color:#000000a6;background:#fffc;border:1px solid #0000000f}[data-theme=light] .history-view-title,[data-theme=light] .stats-panel,[data-theme=light] .new-quiz-panel{color:var(--text);background:#fffc;border:1px solid #00c8531f}[data-theme=light] ::-webkit-scrollbar-track{background:#e8ecef}[data-theme=light] ::-webkit-scrollbar-thumb{background:#00c85366;border:2px solid #e8ecef}[data-theme=light] ::-webkit-scrollbar-thumb:hover{background:#00c853b3}[data-theme=light] ::-webkit-scrollbar-corner{background:#e8ecef}[data-theme=light] .sidebar-brand{color:var(--text);text-shadow:none}[data-theme=light] .sidebar-nav-btn{color:#333;background:#ffffffd1;border:1px solid #00000014}[data-theme=light] .sidebar-nav-btn:hover{background:#ebf5eee6;border-color:#00c85380}[data-theme=light] .sidebar-nav-btn.active{border-color:var(--green);color:var(--green);background:#00c8531a}[data-theme=light] .sidebar-nav-btn.primary{background:var(--green);color:#fff;border-color:var(--green);box-shadow:0 0 12px #00c8532e}[data-theme=light] .sidebar-nav-btn.primary:hover{color:#fff;background:#00b84a;box-shadow:0 0 18px #00c8534d}[data-theme=light] .dashboard-nav-card{background:var(--panel-soft);border:1px solid var(--line)}[data-theme=light] .dashboard-nav-card:hover,[data-theme=light] .dashboard-nav-card:active{background:var(--panel-hover);border-color:#00c85373;box-shadow:0 8px 24px #00c85314}[data-theme=light] .dashboard-nav-card .card-title{color:var(--text)}[data-theme=light] .dashboard-quota-card{background:var(--panel-soft);border:1px solid var(--line)}[data-theme=light] .dashboard-quota-card .quota-row strong{color:var(--green-2)}[data-theme=light] .browser-update-message{color:#000000a6}[data-theme=light] .browser-update-message strong{color:var(--text)}[data-theme=light] .skeleton-title,[data-theme=light] .skeleton-text,[data-theme=light] .skeleton-card{background:linear-gradient(90deg,#d0d5d8 25%,#e0e5e8 50%,#d0d5d8 75%) 0 0/200% 100%}[data-theme=light] .skeleton-logo{background:linear-gradient(135deg,#66bb6a,#81c784)}[data-theme=light] .tab-btn{color:#888}[data-theme=light] .tab-btn.active{color:var(--green);border-bottom-color:var(--green)}[data-theme=light] .google-btn{color:#333;background:#ffffffe6;border:1px solid #0000001a}[data-theme=light] .google-btn:hover{background:#fff;border-color:#00c8534d}[data-theme=light] .divider{color:#999}[data-theme=light] .divider:before,[data-theme=light] .divider:after{border-bottom:1px solid #0000001a}[data-theme=light] .quiz-collection .history-stats{background:#ffffffb8;border:1px solid #0000000f}[data-theme=light] .quiz-collection .history-item{background:#ffffffbf;border:1px solid #0000000f}[data-theme=light] .quiz-collection .history-item:hover{background:#f0f8f2d1;border-color:#00c85340}[data-theme=light] .container.ai-border:before{background:conic-gradient(#0000 0deg 70deg,#00c850d9 110deg,#0099ccbf 150deg,#0000 220deg 360deg)}*{box-sizing:border-box}html,body{min-height:100%;color:var(--text);background:radial-gradient(circle at 18% 18%, #00ff8838, transparent 32%), radial-gradient(circle at 82% 42%, #00d5ff24, transparent 36%), radial-gradient(circle at 52% 92%, #00ff881a, transparent 34%), var(--bg-base);margin:0;padding:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Arial,sans-serif;overflow-x:hidden}body{position:relative}body:before{content:"";pointer-events:none;z-index:0;background-color:#0000;background-image:linear-gradient(#00d5550e 1px,#0000 1px),linear-gradient(90deg,#00d5550e 1px,#0000 1px);background-position:0 0,0 0;background-repeat:repeat,repeat;background-size:42px 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.2s;display:flex}.google-btn:hover{background:#252525fa;border-color:#00d55559}.google-icon{width:18px;height:18px}.navbar{z-index:2;-webkit-backdrop-filter:blur(16px);background:#06110dc2;border-bottom:1px solid #00d55529;justify-content:space-between;align-items:center;min-height:52px;padding:12px 30px;display:flex;position:relative;box-shadow:0 4px 20px #00000040}.navbar button{color:var(--danger);cursor:pointer;background:#222222e0;border:1px solid #ff4d4f47;border-radius:7px;padding:8px 16px;font-weight:800}.navbar button:hover{background:#2a1415f5}.app-layout{z-index:1;background:0 0;align-items:stretch;min-height:calc(100vh - 52px);padding-bottom:68px;display:flex;position:relative}.main-content{background:0 0;flex:1;min-width:0;padding:0 20px}.container{z-index:1;border-radius:var(--radius-lg);-webkit-backdrop-filter:blur(18px);max-width:1360px;box-shadow:var(--shadow-main);background:#0a100dc2;border:1px solid #00d55529;margin:20px auto;padding:10px;position:relative;overflow:hidden}.container>*{z-index:2;position:relative}.container:before,.container:after{content:none}.container.ai-border:before{content:"";border-radius:inherit;pointer-events:none;z-index:1;-webkit-mask-composite:xor;background:conic-gradient(#0000 0deg 70deg,#00ff88f2 110deg,#00d5ffd9 150deg,#0000 220deg 360deg);padding:2px;animation:7s linear infinite borderSpin;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#000 0 0),linear-gradient(#000 0 0);mask-image:linear-gradient(#000 0 0),linear-gradient(#000 0 0);-webkit-mask-position:0 0,0 0;mask-position:0 0,0 0;-webkit-mask-size:auto,auto;mask-size:auto,auto;-webkit-mask-repeat:repeat,repeat;mask-repeat:repeat,repeat;-webkit-mask-clip:content-box,border-box;mask-clip:content-box,border-box;-webkit-mask-origin:content-box,border-box;mask-origin:content-box,border-box;-webkit-mask-composite:xor;mask-composite:exclude;-webkit-mask-source-type:auto,auto;mask-mode:match-source,match-source}@keyframes borderSpin{to{transform:rotate(360deg)}}.quiz-container,#quiz-display-area{width:100%;max-width:1400px;margin:0 auto;padding:20px 16px 100px;overflow-x:hidden}#quiz-display-area:not(:empty){padding:20px 16px 60px}@media (width<=768px){#quiz-display-area:not(:empty){padding:12px 8px 50px}}#quiz-display-area>.question-block:first-child~p:first-of-type,#quiz-display-area>.history-view-title:first-child~p:first-of-type{display:none}.quiz-upload-section{text-align:center;padding:30px 20px}.quiz-upload-section h2{color:var(--green-2);text-shadow:0 0 12px #00ff884d;margin-bottom:8px;font-size:24px;font-weight:800}.quiz-upload-subtitle{color:var(--muted);margin-bottom:24px;font-size:14px;line-height:1.6}.quiz-upload-label{border-radius:var(--radius-md);background:var(--green);color:#06110d;cursor:pointer;padding:14px 32px;font-size:15px;font-weight:800;transition:all .25s;display:inline-block;box-shadow:0 0 20px #00d55533}.quiz-upload-label:hover{background:#0ce763;transform:translateY(-2px);box-shadow:0 0 30px #00d55566}.quiz-upload-label:active{transform:scale(.97)}.quiz-file-input{display:none}.file-staging-area{border:1px solid var(--line);border-radius:var(--radius-md);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0c1410d9;margin-top:16px;padding:12px}.file-staging-header{color:var(--muted);justify-content:space-between;align-items:center;margin-bottom:8px;font-size:13px;display:flex}.file-staging-clear-btn{color:var(--danger);cursor:pointer;background:0 0;border:1px solid #ff4d4f4d;border-radius:8px;padding:4px 12px;font-size:12px;transition:all .2s}.file-staging-clear-btn:hover{border-color:var(--danger);background:#ff4d4f26}.file-staging-list{max-height:180px;margin:0;padding:0;list-style:none;overflow-y:auto}.file-staging-item{color:var(--text);border-radius:8px;align-items:center;gap:8px;padding:6px 8px;font-size:13px;transition:background .15s;display:flex}.file-staging-item:hover{background:#ffffff0d}.file-staging-item .file-icon{flex-shrink:0;font-size:16px}.file-staging-item .file-name{text-overflow:ellipsis;white-space:nowrap;flex:1;overflow:hidden}.file-staging-item .file-size{color:var(--muted);flex-shrink:0;font-size:11px}.file-staging-item .file-remove-btn{color:var(--danger);cursor:pointer;background:0 0;border:none;border-radius:4px;flex-shrink:0;padding:2px 6px;font-size:14px;transition:background .15s}.file-staging-item .file-remove-btn:hover{background:#ff4d4f33}[data-theme=light] .file-staging-area{background:#f5f7fae6;border-color:#0000001a}[data-theme=light] .file-staging-item:hover{background:#0000000a}.quiz-loading{text-align:center;padding:60px 20px}.quiz-loading-spinner{border:3px solid #0f83;border-top-color:var(--green-2);border-radius:50%;width:48px;height:48px;margin:0 auto 20px;animation:.8s linear infinite quiz-spin}@keyframes quiz-spin{to{transform:rotate(360deg)}}.quiz-loading-text{color:var(--muted);font-size:14px;font-weight:600}.quiz-loading-subtext{color:#666;margin-top:8px;font-size:12px}.history-sidebar{display:none!important}.sidebar-brand{color:#fff;letter-spacing:.2px;text-shadow:0 0 10px #00d5554d,0 0 25px #00d55529;padding:0 6px 14px;font-size:16px;font-weight:800;line-height:1.25}.app-version{color:#ffffff8c;margin-top:4px;font-size:11px;font-weight:500}.sidebar-nav{flex-direction:column;gap:10px;margin-bottom:16px;display:flex}.sidebar-nav-btn{color:#f2f2f2;text-align:center;cursor:pointer;background:#0c0f0ed1;border:1px solid #ffffff14;border-radius:13px;width:100%;min-height:44px;padding:0 16px;font-size:14px;font-weight:800;transition:border-color .2s,background .2s,transform .2s,box-shadow .2s}.sidebar-nav-btn:hover{background:#0c1912e6;border-color:#00d5558c;transform:translateY(-1px)}.sidebar-nav-btn.active{border-color:var(--green);color:var(--green);background:#00d5551f}.sidebar-nav-btn.primary{background:var(--green);color:#06110d;border-color:var(--green);text-align:center;box-shadow:0 0 20px #00d5553d}.sidebar-nav-btn.primary:hover{color:#06110d;background:#0ce763;box-shadow:0 0 28px #00d55561}.history-stats{color:#ffffffc7;background:#0c0f0ed1;border:1px solid #ffffff14;border-radius:14px;margin-bottom:14px;padding:14px 16px;font-size:13px;line-height:1.6}.history-section-title{color:#fff;margin:20px 0 12px;padding:0 8px;font-size:16px;font-weight:800}.history-list{scrollbar-width:thin;scrollbar-color:transparent 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