@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;700;800&display=swap";:root{--primary: #3b82f6;--primary-glow: rgba(59, 130, 246, .4);--secondary: #10b981;--bg-dark: #0f172a;--bg-darker: #020617;--bg-card: rgba(30, 41, 59, .7);--text-main: #f8fafc;--text-muted: #94a3b8;--border-subtle: rgba(255, 255, 255, .1);--glass-bg: rgba(15, 23, 42, .6);--bg-input: rgba(15, 23, 42, .8)}[data-theme=light]{--primary: #2563eb;--primary-glow: rgba(37, 99, 235, .3);--secondary: #059669;--bg-dark: #f1f5f9;--bg-darker: #e2e8f0;--bg-card: rgba(255, 255, 255, .85);--text-main: #0f172a;--text-muted: #64748b;--border-subtle: rgba(0, 0, 0, .1);--glass-bg: rgba(248, 250, 252, .85);--bg-input: rgba(241, 245, 249, .9)}[data-theme=light] body{background-color:var(--bg-darker);color:var(--text-main)}[data-theme=light] .fixed-sidebar{background:#f8fafc;border-color:#00000014}[data-theme=light] .glass-panel{background:#ffffffe6;border-color:#00000014;box-shadow:0 4px 20px #00000014}[data-theme=light] .input-field{background-color:var(--bg-input);border-color:#00000026;color:var(--text-main)}[data-theme=light] .sidebar-link:hover{background:#0000000a}[data-theme=light] .sidebar-link.active{background:#2563eb1a;color:var(--primary)}[data-theme=light] .option-btn{background:#00000005;border-color:#0000001a;color:var(--text-main)}[data-theme=light] .option-btn:hover:not(:disabled){background:#0000000d}[data-theme=light] .option-letter{background:#00000014}[data-theme=light] .navbar{background:#f8fafce6;border-color:#00000014}[data-theme=light] .nav-brand,[data-theme=light] select{color:var(--text-main)}[data-theme=light] select{background:var(--bg-input);border-color:#00000026}[data-theme=light] .hero:before{background:radial-gradient(circle,rgba(37,99,235,.12) 0%,transparent 60%)}[data-theme=light] .text-gradient{background:linear-gradient(135deg,#2563eb,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,sans-serif;background-color:var(--bg-darker);color:var(--text-main);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-family:Outfit,sans-serif}.text-gradient{background:linear-gradient(135deg,#60a5fa,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;color:transparent}.glass-panel{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border-subtle);border-radius:16px;box-shadow:0 4px 30px #00000080}.app-container{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1;position:relative}.fixed-sidebar{position:fixed;left:0;top:0;bottom:0;width:280px;background:var(--bg-dark);border-right:1px solid var(--border-subtle);display:flex;flex-direction:column;z-index:100;transition:all .3s ease}.sidebar-header{padding:32px 24px}.no-margin{margin:0!important}.sidebar-content{flex:1;overflow-y:auto;padding:0 16px}.sidebar-nav{display:flex;flex-direction:column;gap:8px}.sidebar-link{display:flex;align-items:center;padding:14px 16px;color:var(--text-muted);text-decoration:none;border-radius:12px;transition:all .2s ease;position:relative}.sidebar-link:hover{background:#ffffff0d;color:var(--text-main)}.sidebar-link.active{background:#3b82f61a;color:var(--primary);font-weight:600}.sidebar-icon{margin-right:16px;display:flex;align-items:center}.sidebar-text{flex:1;font-size:.95rem}.active-dot{width:6px;height:6px;background:var(--primary);border-radius:50%;box-shadow:0 0 10px var(--primary)}.sidebar-footer{padding:24px 16px}.user-mini-card{display:flex;align-items:center;gap:12px;padding:12px!important;border-radius:16px!important}.avatar-small{width:36px;height:36px;border-radius:50%;background:var(--primary);display:flex;align-items:center;justify-content:center;overflow:hidden}.avatar-small img{width:100%;height:100%;object-fit:cover}.user-info{flex:1;display:flex;flex-direction:column}.user-name{font-size:.875rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-role{font-size:.75rem;color:var(--text-muted)}.settings-btn{color:var(--text-muted);transition:color .2s}.settings-btn:hover{color:var(--text-main)}.with-sidebar{padding-left:280px}.subcategory-item:hover{background:#ffffff14!important;border-color:var(--primary)}@media(max-width:1024px){.fixed-sidebar{width:80px}.sidebar-text,.user-info,.sidebar-header span,.settings-btn{display:none}.with-sidebar{padding-left:80px}.sidebar-header{justify-content:center;padding:24px 0}.sidebar-icon{margin-right:0}.sidebar-link{justify-content:center}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-family:Inter,sans-serif;font-weight:600;font-size:1rem;border-radius:9999px;border:none;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);text-decoration:none}.btn-primary{background-color:var(--primary);color:#fff;box-shadow:0 0 20px var(--primary-glow)}.btn-primary:hover{background-color:#2563eb;transform:translateY(-2px);box-shadow:0 0 30px var(--primary-glow)}.btn-outline{background-color:transparent;color:var(--text-main);border:1px solid var(--border-subtle)}.btn-outline:hover{background-color:#ffffff0d;border-color:#ffffff4d}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.input-group{margin-bottom:20px;display:flex;flex-direction:column;gap:8px}.input-label{font-size:.875rem;font-weight:500;color:var(--text-muted)}.input-field{width:100%;padding:12px 16px;background-color:#0f172acc;border:1px solid var(--border-subtle);border-radius:8px;color:#fff;font-family:Inter,sans-serif;font-size:1rem;transition:all .3s ease;outline:none}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-glow)}.navbar{position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:16px 5%;background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-subtle)}.nav-brand{font-family:Outfit,sans-serif;font-size:1.5rem;font-weight:800;color:#fff;text-decoration:none;display:flex;align-items:center;gap:12px}.nav-links{display:flex;gap:24px;align-items:center}.nav-link{color:var(--text-muted);text-decoration:none;font-weight:500;transition:color .3s}.nav-link:hover{color:#fff}.hero{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:100px 5%;text-align:center;min-height:80vh;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-20%;left:50%;transform:translate(-50%);width:600px;height:600px;background:radial-gradient(circle,var(--primary-glow) 0%,transparent 60%);z-index:-1;pointer-events:none}.hero-title{font-size:4rem;line-height:1.1;margin-bottom:24px;max-width:800px}.hero-subtitle{font-size:1.25rem;color:var(--text-muted);max-width:600px;margin-bottom:40px;line-height:1.6}.hero-buttons{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}.features{padding:80px 5%;display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:32px;max-width:1200px;margin:0 auto}.feature-card{padding:32px;display:flex;flex-direction:column;gap:16px;transition:transform .3s ease}.feature-card:hover{transform:translateY(-8px)}.feature-icon{width:48px;height:48px;background:#3b82f61a;color:var(--primary);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:8px}.feature-title{font-size:1.5rem}.feature-desc{color:var(--text-muted);line-height:1.6}.auth-container{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 80px);padding:40px 5%}.auth-card{width:100%;max-width:400px;padding:40px}.auth-header{text-align:center;margin-bottom:32px}.auth-title{font-size:2rem;margin-bottom:8px}.auth-subtitle{color:var(--text-muted)}.dashboard-container{max-width:1200px;margin:0 auto;padding:40px 5%}.dashboard-header{margin-bottom:40px;display:flex;justify-content:space-between;align-items:center}.exam-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}.exam-card{padding:24px;cursor:pointer}.exam-card:hover{border-color:var(--primary);box-shadow:0 0 20px var(--primary-glow)}.exam-info{display:flex;justify-content:space-between;margin-top:16px;font-size:.875rem;color:var(--text-muted)}.solver-container{max-width:800px;margin:40px auto;padding:0 5%}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;color:var(--text-muted);font-size:.875rem}.question-text{font-size:1.5rem;line-height:1.4;margin-bottom:32px}.options-list{display:flex;flex-direction:column;gap:16px}.option-btn{width:100%;text-align:left;padding:16px 20px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:12px;cursor:pointer;font-size:1rem;color:var(--text-main);transition:all .2s;display:flex;align-items:center;gap:16px}.option-letter{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;background:#ffffff1a;border-radius:8px;font-weight:600;font-size:.875rem}.option-btn:hover:not(:disabled){background:#ffffff14;border-color:#fff3}.option-btn.selected{border-color:var(--primary);background:#3b82f61a}.option-btn.selected .option-letter{background:var(--primary);color:#fff}.option-btn.correct{border-color:var(--secondary);background:#10b9811a}.option-btn.correct .option-letter{background:var(--secondary);color:#fff}.option-btn.wrong{border-color:#ef4444;background:#ef44441a}.option-btn.wrong .option-letter{background:#ef4444;color:#fff}.solver-footer{margin-top:40px;display:flex;justify-content:space-between;align-items:center}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .5s ease forwards}.question-image{max-width:100%;border-radius:12px;margin-bottom:24px}