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a{align-items:center;gap:10px;text-decoration:none;display:flex}.logo-icon-wrap{color:#fff;background:linear-gradient(135deg,#6366f1 0%,#8b5cf6 100%);border-radius:8px;justify-content:center;align-items:center;width:34px;height:34px;display:flex;box-shadow:0 0 12px #6366f166}.navbar-logo h2{color:#f8fafc;letter-spacing:-.02em;margin:0;font-size:20px;font-weight:700}.navbar-links{align-items:center;gap:28px;display:flex}.navbar-links a{color:#94a3b8;font-size:14.5px;font-weight:500;text-decoration:none;transition:color .2s;position:relative}.navbar-links a:hover{color:#f8fafc}.navbar-user{align-items:center;gap:16px;display:flex}.user-xp-badge{color:#fbbf24;background:#f59e0b1f;border:1px solid #f59e0b40;border-radius:9999px;align-items:center;gap:6px;padding:5px 10px;font-size:13px;font-weight:700;display:flex}.user-profile-chip{background:#ffffff0d;border:1px solid #ffffff14;border-radius:9999px;align-items:center;gap:10px;padding:4px 12px 4px 4px;text-decoration:none;transition:all 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#6366f126}.sidebar-link.admin-link{color:#f0abfc}.sidebar-link.admin-link.active{color:#f5d0fe;background:#d946ef26;border-color:#d946ef59}.sidebar-arena-pro{background:linear-gradient(145deg,#6366f11f 0%,#8b5cf60f 100%);border:1px solid #6366f140;border-radius:14px;margin-top:24px;padding:16px}.pro-badge{color:#c7d2fe;background:#6366f133;border-radius:6px;align-items:center;gap:6px;margin-bottom:6px;padding:3px 8px;font-size:.72rem;font-weight:800;display:inline-flex}.pro-text{color:#f8fafc;font-size:.84rem;font-weight:600}.pro-xp{color:#fbbf24;margin-top:4px;font-size:.78rem;font-weight:700}@media (width<=768px){.sidebar{width:100%;height:auto;min-height:unset;z-index:45;background-color:#0b101d;border-bottom:1px solid #ffffff14;border-right:none;flex-direction:row;justify-content:flex-start;align-items:center;padding:8px 12px;position:sticky;top:60px;box-shadow:0 4px 16px #0006}.sidebar-section-title{display:none}.sidebar-menu{-webkit-overflow-scrolling:touch;flex-flow:row;gap:8px;width:100%;padding-bottom:2px;overflow-x:auto}.sidebar-menu::-webkit-scrollbar{height:3px}.sidebar-menu::-webkit-scrollbar-thumb{background:#6366f166;border-radius:3px}.sidebar-link{white-space:nowrap;border-radius:8px;flex-shrink:0;gap:8px;padding:8px 12px;font-size:.82rem}.sidebar-arena-pro{display:none}}:root{--arena-bg:#0b0f19;--arena-surface:#111827;--arena-card-bg:#111827d9;--arena-card-border:#ffffff14;--arena-input-bg:#0f172acc;--arena-input-border:#ffffff1f;--arena-primary:#6366f1;--arena-primary-hover:#4f46e5;--arena-accent:#8b5cf6;--arena-cyan:#06b6d4;--arena-emerald:#10b981;--arena-amber:#f59e0b;--arena-rose:#f43f5e;--arena-text-main:#f8fafc;--arena-text-muted:#94a3b8;--arena-text-dim:#64748b;--arena-gradient:linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--arena-glow:0 0 20px #6366f140}.arena-page{max-width:1280px;margin:0 auto;padding:8px 4px 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h1{font-size:1.45rem}.arena-card{border-radius:14px;padding:16px 12px}.arena-stats-grid{grid-template-columns:1fr;gap:12px}.arena-stat-card{border-radius:14px;padding:14px 16px}.stat-val{font-size:1.4rem}.podium-container{flex-direction:column;align-items:center;gap:14px;margin:20px 0 28px}.podium-card{width:100%;max-width:100%;padding:16px}.podium-card.rank-1{order:-1}.arena-table{min-width:580px}.arena-table th,.arena-table td{padding:12px 14px;font-size:.84rem}.mcq-option-card{padding:12px 14px;font-size:.9rem}}:root{--auth-bg:#0b0f19;--auth-card-bg:#111827d1;--auth-card-border:#ffffff14;--auth-input-bg:#0f172abf;--auth-input-border:#ffffff1f;--auth-input-focus:#6366f1;--auth-primary:#6366f1;--auth-primary-hover:#4f46e5;--auth-accent-gradient:linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);--auth-btn-gradient:linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);--auth-btn-hover-gradient:linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);--auth-text-main:#f8fafc;--auth-text-muted:#94a3b8;--auth-text-dim:#64748b;--auth-success:#10b981;--auth-error:#f43f5e;--auth-warning:#f59e0b}.auth-page-container{background-color:var(--auth-bg);box-sizing:border-box;background-image:radial-gradient(circle at 15% 20%,#6366f126 0%,#0000 40%),radial-gradient(circle at 85% 80%,#8b5cf626 0%,#0000 40%),radial-gradient(circle,#06b6d40f 0%,#0000 60%);justify-content:center;align-items:center;min-height:calc(100vh - 70px);padding:40px 20px;display:flex;position:relative;overflow:hidden}.auth-page-container:before{content:"";pointer-events:none;background-color:#0000;background-image:linear-gradient(90deg,#ffffff05 1px,#0000 1px),linear-gradient(#ffffff05 1px,#0000 1px);background-position:0 0,0 0;background-repeat:repeat,repeat;background-size:32px 32px;background-attachment:scroll,scroll;background-origin:padding-box,padding-box;background-clip:border-box,border-box;position:absolute;inset:0}.auth-layout-wrapper{z-index:2;background:var(--auth-card-bg);-webkit-backdrop-filter:blur(20px);border:1px solid var(--auth-card-border);border-radius:24px;width:100%;max-width:1050px;min-height:620px;display:flex;position:relative;overflow:hidden;box-shadow:0 25px 50px -12px #0009,0 0 0 1px #ffffff0d,inset 0 1px #ffffff1a}.auth-hero-section{border-right:1px solid var(--auth-card-border);background:linear-gradient(145deg,#1e293b99 0%,#0f172acc 100%);flex-direction:column;flex:1;justify-content:space-between;padding:48px;display:flex;position:relative}.auth-hero-badge{color:#a5b4fc;letter-spacing:.05em;text-transform:uppercase;background:#6366f126;border:1px solid #6366f14d;border-radius:9999px;align-items:center;gap:8px;width:fit-content;padding:6px 14px;font-size:.8rem;font-weight:600;display:inline-flex}.auth-hero-title{color:var(--auth-text-main);letter-spacing:-.02em;margin:20px 0 12px;font-size:2.3rem;font-weight:800;line-height:1.15}.auth-hero-title span{background:var(--auth-accent-gradient);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.auth-hero-desc{color:var(--auth-text-muted);margin:0 0 32px;font-size:1rem;line-height:1.6}.auth-features-list{flex-direction:column;gap:18px;margin-bottom:24px;display:flex}.auth-feature-item{align-items:flex-start;gap:14px;display:flex}.auth-feature-icon{color:#818cf8;background:#6366f11f;border:1px solid #6366f140;border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.auth-feature-title{color:var(--auth-text-main);margin-bottom:2px;font-size:.95rem;font-weight:600}.auth-feature-text{color:var(--auth-text-muted);font-size:.82rem;line-height:1.4}.auth-hero-preview-card{background:#0f172acc;border:1px solid #ffffff14;border-radius:14px;padding:16px;box-shadow:0 10px 25px #0000004d}.auth-preview-header{border-bottom:1px solid #ffffff0f;justify-content:space-between;align-items:center;margin-bottom:12px;padding-bottom:8px;display:flex}.auth-preview-dots{gap:6px;display:flex}.auth-preview-dots span{border-radius:50%;width:10px;height:10px}.auth-preview-dots span:first-child{background:#ef4444}.auth-preview-dots span:nth-child(2){background:#f59e0b}.auth-preview-dots span:nth-child(3){background:#10b981}.auth-preview-code{color:#a5b4fc;margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:.8rem;line-height:1.5}.auth-form-section{background:#11182799;flex-direction:column;flex:1.15;justify-content:center;padding:44px 48px;display:flex}.auth-header{margin-bottom:24px}.auth-header h1{color:var(--auth-text-main);letter-spacing:-.02em;margin:0 0 8px;font-size:1.85rem;font-weight:700}.auth-header p{color:var(--auth-text-muted);margin:0;font-size:.92rem}.auth-google-btn{border:1px solid var(--auth-input-border);width:100%;color:var(--auth-text-main);cursor:pointer;background:#ffffff0d;border-radius:12px;justify-content:center;align-items:center;gap:12px;padding:12px 18px;font-size:.95rem;font-weight:500;transition:all .2s;display:flex}.auth-google-btn:hover{background:#ffffff1a;border-color:#ffffff40;transform:translateY(-1px)}.auth-google-icon{width:20px;height:20px}.auth-divider{color:var(--auth-text-dim);text-transform:uppercase;letter-spacing:.05em;align-items:center;margin:20px 0;font-size:.8rem;display:flex}.auth-divider:before,.auth-divider:after{content:"";border-bottom:1px solid #ffffff14;flex:1}.auth-divider span{padding:0 12px}.auth-form{flex-direction:column;gap:18px;display:flex}.auth-input-group{flex-direction:column;gap:6px;display:flex}.auth-input-label{color:#cbd5e1;justify-content:space-between;align-items:center;font-size:.86rem;font-weight:500;display:flex}.auth-input-wrapper{align-items:center;display:flex;position:relative}.auth-input-icon{color:var(--auth-text-dim);pointer-events:none;align-items:center;display:flex;position:absolute;left:14px}.auth-input{background:var(--auth-input-bg);border:1px solid var(--auth-input-border);width:100%;color:var(--auth-text-main);border-radius:12px;outline:none;padding:12px 14px 12px 42px;font-size:.95rem;transition:all .2s}.auth-input::placeholder{color:var(--auth-text-dim)}.auth-input:focus{border-color:var(--auth-input-focus);background:#0f172af2;box-shadow:0 0 0 3px #6366f133}.auth-input.has-error{border-color:var(--auth-error);box-shadow:0 0 0 3px #f43f5e26}.auth-toggle-password{color:var(--auth-text-dim);cursor:pointer;background:0 0;border:none;align-items:center;padding:0;transition:color .2s;display:flex;position:absolute;right:14px}.auth-toggle-password:hover{color:var(--auth-text-main)}.auth-password-strength{flex-direction:column;gap:6px;margin-top:4px;display:flex}.strength-bar-track{background:#ffffff14;border-radius:4px;gap:4px;width:100%;height:4px;display:flex;overflow:hidden}.strength-bar-fill{border-radius:4px;flex:1;height:100%;transition:background-color .3s}.strength-label-text{color:var(--auth-text-dim);justify-content:space-between;font-size:.75rem;display:flex}.strength-label-text span.weak{color:#f43f5e;font-weight:600}.strength-label-text span.medium{color:#f59e0b;font-weight:600}.strength-label-text span.strong{color:#10b981;font-weight:600}.auth-alert{border-radius:12px;align-items:flex-start;gap:12px;padding:12px 16px;font-size:.88rem;line-height:1.4;animation:.3s cubic-bezier(.16,1,.3,1) authSlideDown;display:flex}.auth-alert-error{color:#fca5a5;background:#ef44441f;border:1px solid #ef444447}.auth-alert-success{color:#6ee7b7;background:#10b9811f;border:1px solid #10b98147}@keyframes authSlideDown{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.auth-submit-btn{background:var(--auth-btn-gradient);color:#fff;letter-spacing:.01em;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:10px;width:100%;margin-top:6px;padding:13px 20px;font-size:1rem;font-weight:600;transition:all .25s;display:flex;box-shadow:0 4px 14px #6366f166}.auth-submit-btn:hover:not(:disabled){background:var(--auth-btn-hover-gradient);transform:translateY(-2px);box-shadow:0 6px 20px #6366f18c}.auth-submit-btn:disabled{opacity:.65;cursor:not-allowed;box-shadow:none;transform:none}.auth-demo-box{background:#6366f114;border:1px dashed #6366f14d;border-radius:12px;justify-content:space-between;align-items:center;margin-top:14px;padding:12px 14px;display:flex}.auth-demo-text{color:#c7d2fe;font-size:.8rem}.auth-demo-btn{color:#e0e7ff;cursor:pointer;background:#6366f133;border:1px solid #6366f166;border-radius:6px;padding:5px 12px;font-size:.78rem;font-weight:600;transition:all .2s}.auth-demo-btn:hover{background:#6366f159}.auth-footer-link{text-align:center;color:var(--auth-text-muted);margin-top:20px;font-size:.9rem}.auth-footer-link a{color:#818cf8;margin-left:6px;font-weight:600;text-decoration:none;transition:color .2s}.auth-footer-link a:hover{color:#a5b4fc;text-decoration:underline}.auth-spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:18px;height:18px;animation:.8s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (width<=900px){.auth-hero-section{display:none}.auth-layout-wrapper{max-width:500px;min-height:auto}.auth-form-section{padding:36px 28px}}@media (width<=600px){.auth-page-container{padding:16px 10px}.auth-layout-wrapper{border-radius:16px;box-shadow:0 10px 30px #00000080}.auth-form-section{padding:24px 16px}.auth-header h1{font-size:1.5rem}.auth-header p{font-size:.84rem}}