.navbar{background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:sticky;top:0;z-index:1000;border-bottom:1px solid rgba(0,0,0,.05);padding:1rem 0}.navbar-content{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:800;color:var(--color-text-main);display:flex;align-items:center;gap:8px}.logo-icon{font-size:1.8rem}.highlight{color:var(--color-soft-blue)}.version-badge{font-size:.75rem;background:#e0f2fe;color:#0284c7;padding:2px 8px;border-radius:12px;margin-left:8px;font-weight:600;letter-spacing:.5px;border:1px solid #bae6fd}.nav-links{display:flex;align-items:center;gap:24px}.nav-item{display:flex;align-items:center;gap:6px;font-weight:600;color:var(--color-text-light);transition:color .2s}.nav-item:hover,.nav-item.active{color:var(--color-soft-blue)}.btn-logout{background:none;color:var(--color-text-light);padding:8px;border-radius:50%;transition:all .2s}.btn-logout:hover{background:#ffebee;color:#e53935}.btn-sm{padding:8px 16px;font-size:.9rem}.home-page{overflow-x:hidden}.hero{padding:80px 0;background:linear-gradient(135deg,#f9f9f9,#eef2f5);position:relative}.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}.hero-title{font-size:3.5rem;margin-bottom:20px;color:var(--color-text-main)}.highlight-text{color:var(--color-soft-blue);position:relative;display:inline-block}.highlight-text:after{content:"";position:absolute;bottom:5px;left:0;width:100%;height:12px;background:#4687e833;z-index:-1;border-radius:4px}.hero-subtitle{font-size:1.2rem;color:var(--color-text-light);margin-bottom:40px;max-width:500px}.hero-buttons{display:flex;gap:16px}.hero-image{position:relative;height:400px;display:flex;justify-content:center;align-items:center}.blob{position:absolute;width:350px;height:350px;background:linear-gradient(135deg,#e0eafc,#cfdef3);border-radius:40% 60% 70% 30%/40% 50% 60%;animation:blob-bounce 10s infinite ease-in-out;z-index:0}@keyframes blob-bounce{0%,to{border-radius:40% 60% 70% 30%/40% 50% 60%;transform:translate(0)}33%{border-radius:70% 30% 50% 50%/30% 30% 70% 70%;transform:translate(10px,-10px)}66%{border-radius:100% 60% 60% 100%/100% 100% 60% 60%;transform:translate(-10px,10px)}}.floating-card{position:absolute;background:#fff;padding:16px 24px;border-radius:16px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;font-weight:700;z-index:1;animation:float 6s ease-in-out infinite}.card-1{top:20%;left:10%;animation-delay:0s}.card-2{top:50%;right:10%;animation-delay:2s}.card-3{bottom:15%;left:20%;animation-delay:4s}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-15px)}}.features{padding:80px 20px}.section-title{font-size:2.5rem;margin-bottom:60px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}.feature-card{text-align:center;padding:40px}.feature-icon{width:80px;height:80px;background:#f8f9fa;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 24px}.feature-card h3{margin-bottom:16px}.feature-card p{color:var(--color-text-light)}@media(max-width:768px){.hero-content{grid-template-columns:1fr;text-align:center}.hero-buttons{justify-content:center}.hero-image{display:none}}.auth-page{min-height:calc(100vh - 80px);display:flex;align-items:center;justify-content:center;padding:40px 20px;background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.auth-container{width:100%;max-width:450px}.auth-card{background:#fff;border-radius:var(--radius-lg);padding:48px;box-shadow:var(--shadow-lg);border:1px solid rgba(0,0,0,.05)}.auth-header{text-align:center;margin-bottom:32px}.auth-header h1{font-size:2rem;color:var(--color-text-main);margin-bottom:8px}.auth-header p{color:var(--color-text-light);font-size:.95rem}.auth-form{display:flex;flex-direction:column;gap:20px}.input-group{display:flex;flex-direction:column;gap:8px}.input-group label{font-weight:600;color:var(--color-text-main);font-size:.9rem;display:flex;align-items:center;gap:6px}.input-group input{padding:14px 16px;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all .2s;background:#fafafa}.input-group input:focus{outline:none;border-color:var(--color-soft-blue);background:#fff;box-shadow:0 0 0 3px #4687e81a}.auth-form button[type=submit]{margin-top:12px;width:100%;justify-content:center}.auth-form button[type=submit]:disabled{opacity:.6;cursor:not-allowed;transform:none}.error-message{background:#fff3f3;border:1px solid #ffcdd2;color:#c62828;padding:12px 16px;border-radius:var(--radius-md);display:flex;align-items:center;gap:10px;font-size:.9rem;margin-bottom:16px}.auth-footer{margin-top:24px;text-align:center;padding-top:24px;border-top:1px solid #f0f0f0}.auth-footer p{color:var(--color-text-light);font-size:.95rem}.link{color:var(--color-soft-blue);font-weight:600;transition:color .2s}.link:hover{color:#357abd;text-decoration:underline}@media(max-width:768px){.auth-card{padding:32px 24px}.auth-header h1{font-size:1.75rem}}.role-selection{display:flex;gap:12px;margin-bottom:20px}.role-btn{flex:1;padding:12px;border:2px solid #e8e8e8;background:#fafafa;border-radius:var(--radius-md);font-weight:600;color:var(--color-text-light);cursor:pointer;transition:all .2s}.role-btn.active{border-color:var(--color-soft-blue);background:#4687e80d;color:var(--color-soft-blue)}.checkbox-section{display:flex;flex-direction:column;gap:16px;margin-bottom:24px}.checkbox-group{display:flex;align-items:flex-start;gap:12px;cursor:pointer;position:relative;-webkit-user-select:none;user-select:none}.checkbox-wrapper{position:relative;width:20px;height:20px;flex-shrink:0;margin-top:2px;border:2px solid #cbd5e1;border-radius:6px;background:#fff;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;justify-content:center}.checkbox-wrapper input{position:absolute;opacity:0;cursor:pointer;height:100%;width:100%;margin:0;z-index:1}.checkbox-wrapper:hover{border-color:var(--color-soft-blue);background:#f8fafc}.checkbox-wrapper:has(input:checked){background-color:var(--color-soft-blue);border-color:var(--color-soft-blue);transform:scale(1.05)}.checkbox-icon{width:14px;height:14px;fill:none;stroke:#fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;opacity:0;transform:scale(.5);transition:all .2s cubic-bezier(.4,0,.2,1);z-index:2;pointer-events:none}.checkbox-wrapper:has(input:checked) .checkbox-icon{opacity:1;transform:scale(1)}.checkbox-label{font-size:.9rem;color:var(--color-text-light);line-height:1.5;transition:color .2s}.checkbox-group:hover .checkbox-label{color:var(--color-text-main)}.link-text{color:var(--color-soft-blue);font-weight:500;position:relative;text-decoration:none;transition:all .2s}.link-text:hover{color:#357abd;text-decoration:underline}.course-card-link{text-decoration:none;display:block}.course-card{padding:28px;display:flex;flex-direction:column;gap:16px;min-height:280px;transition:all .3s ease;border:2px solid transparent}.course-card:hover{border-color:var(--color-soft-blue);transform:translateY(-8px)}.course-card-header{display:flex;align-items:center;gap:16px}.course-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--color-soft-blue),#357abd);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.course-card h3{font-size:1.5rem;color:var(--color-text-main);margin:0}.course-description{color:var(--color-text-light);font-size:.95rem;line-height:1.6;flex-grow:1}.course-stats{display:flex;gap:16px;padding:12px 0;border-top:1px solid #f0f0f0;border-bottom:1px solid #f0f0f0}.stat{display:flex;align-items:center;gap:6px;color:var(--color-text-light);font-size:.9rem;font-weight:600}.stat.completed{color:var(--color-soft-green)}.progress-bar-container{display:flex;align-items:center;gap:12px}.progress-bar{flex-grow:1;height:8px;background:#e8e8e8;border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--color-soft-green),#2d9668);border-radius:999px;transition:width .5s ease}.progress-text{font-weight:700;color:var(--color-soft-green);font-size:.9rem;min-width:45px;text-align:right}.course-card-footer{display:flex;justify-content:space-between;align-items:center}.status-badge{padding:6px 14px;border-radius:999px;font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.status-badge.new{background:#e3f2fd;color:var(--color-soft-blue)}.status-badge.in-progress{background:#fff3e0;color:#f57c00}.status-badge.completed{background:#e8f5e9;color:var(--color-soft-green)}.courses-page{padding:60px 0;min-height:calc(100vh - 80px);background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.courses-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:48px;gap:24px;flex-wrap:wrap}.header-content h1{display:flex;align-items:center;gap:16px;font-size:2.5rem;color:var(--color-text-main);margin-bottom:8px}.header-content p{color:var(--color-text-light);font-size:1.1rem}.stats-card{display:flex;align-items:center;gap:16px;padding:20px 28px;min-width:200px}.stats-card svg{color:var(--color-soft-blue)}.stats-number{font-size:2rem;font-weight:800;color:var(--color-text-main)}.stats-label{color:var(--color-text-light);font-size:.9rem}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:28px}.loading{text-align:center;padding:100px 20px;font-size:1.2rem;color:var(--color-text-light)}.empty-state{text-align:center;padding:100px 20px;color:var(--color-text-light)}.empty-state p{margin-top:16px;font-size:1.1rem}@media(max-width:768px){.courses-header{flex-direction:column;align-items:flex-start}.header-content h1{font-size:2rem}.courses-grid{grid-template-columns:1fr}}.course-view-page{padding:40px 0 80px;min-height:calc(100vh - 80px);background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.back-button{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;background:#fff;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-weight:600;color:var(--color-text-light);margin-bottom:32px;transition:all .2s}.back-button:hover{border-color:var(--color-soft-blue);color:var(--color-soft-blue)}.course-view-header{margin-bottom:48px}.course-title-section{display:flex;align-items:flex-start;gap:24px;margin-bottom:32px}.course-icon-large{width:80px;height:80px;background:linear-gradient(135deg,var(--color-soft-blue),#357abd);border-radius:16px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.course-title-section h1{font-size:2.5rem;margin-bottom:12px;color:var(--color-text-main)}.course-title-section p{font-size:1.1rem;color:var(--color-text-light);line-height:1.6}.progress-section{padding:32px}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-weight:600}.progress-percentage{font-size:1.8rem;color:var(--color-soft-green)}.progress-bar-large{height:16px;background:#e8e8e8;border-radius:999px;overflow:hidden;margin-bottom:12px}.progress-fill-large{height:100%;background:linear-gradient(90deg,var(--color-soft-green),#2d9668);border-radius:999px;transition:width .5s ease}.progress-stats{color:var(--color-text-light);font-size:.95rem}.lessons-section h2{font-size:2rem;margin-bottom:24px;color:var(--color-text-main)}.lessons-list{display:flex;flex-direction:column;gap:16px}.lesson-item{display:flex;align-items:center;gap:20px;padding:24px;cursor:pointer;transition:all .3s ease;border:2px solid transparent}.lesson-item:hover{border-color:var(--color-soft-blue);transform:translate(8px)}.lesson-item.completed{background:linear-gradient(135deg,#f1f8f4,#e8f5e9)}.lesson-number{width:48px;height:48px;background:linear-gradient(135deg,var(--color-soft-blue),#357abd);color:#fff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;flex-shrink:0}.lesson-item.completed .lesson-number{background:linear-gradient(135deg,var(--color-soft-green),#2d9668)}.lesson-content{flex-grow:1}.lesson-content h3{font-size:1.3rem;color:var(--color-text-main);margin:0}.lesson-status{flex-shrink:0}.icon-completed{color:var(--color-soft-green)}.icon-pending{color:#ccc}@media(max-width:768px){.course-title-section{flex-direction:column}.course-title-section h1{font-size:2rem}.lesson-item{gap:16px}}.question-container{padding:32px;background:#fff;border-radius:var(--radius-lg);margin:24px 0}.question-text{font-size:1.3rem;color:var(--color-text-main);margin-bottom:24px;font-weight:600}.options-list{display:flex;flex-direction:column;gap:12px}.option-button{padding:16px 20px;border:2px solid #e8e8e8;border-radius:var(--radius-md);background:#fff;text-align:left;font-size:1rem;transition:all .2s;cursor:pointer;display:flex;align-items:center;gap:12px}.option-button:hover:not(:disabled){border-color:var(--color-soft-blue);background:#f8f9fa}.option-button.selected{border-color:var(--color-soft-blue);background:#e3f2fd}.option-button.correct{border-color:var(--color-soft-green);background:#e8f5e9;color:var(--color-soft-green);font-weight:600}.option-button.wrong{border-color:#f44336;background:#ffebee;color:#c62828}.option-button.missed{border-color:var(--color-soft-yellow);background:#fff9e6}.checkbox-icon{width:24px;height:24px;border:2px solid #ccc;border-radius:4px;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.option-button.selected .checkbox-icon{background:var(--color-soft-blue);border-color:var(--color-soft-blue);color:#fff}.fill-blank-input{width:100%;padding:16px;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-size:1.1rem;font-family:inherit;transition:all .2s}.fill-blank-input:focus{outline:none;border-color:var(--color-soft-blue)}.fill-blank-input.correct{border-color:var(--color-soft-green);background:#e8f5e9}.fill-blank-input.wrong{border-color:#f44336;background:#ffebee}.correct-answer{margin-top:12px;padding:12px 16px;background:#fff3e0;border-left:4px solid var(--color-soft-yellow);border-radius:4px;font-weight:600}.true-false-buttons{display:flex;gap:16px}.tf-button{flex:1;padding:24px;border:2px solid #e8e8e8;border-radius:var(--radius-md);background:#fff;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all .2s}.tf-button:hover:not(:disabled){border-color:var(--color-soft-blue);transform:translateY(-2px)}.tf-button.selected{border-color:var(--color-soft-blue);background:#e3f2fd}.tf-button.correct{border-color:var(--color-soft-green);background:#e8f5e9;color:var(--color-soft-green)}.tf-button.wrong{border-color:#f44336;background:#ffebee;color:#c62828}.matching-container{display:flex;gap:24px}.matching-left,.matching-right{flex:1;display:flex;flex-direction:column;gap:12px}.matching-item{padding:16px;background:#f8f9fa;border-radius:var(--radius-md);font-weight:600}.matching-select{padding:12px;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-size:1rem;cursor:pointer;margin-bottom:8px}.matching-select.correct{border-color:var(--color-soft-green);background:#e8f5e9}.matching-select.wrong{border-color:#f44336;background:#ffebee}.explanation{margin-top:20px;padding:16px 20px;background:linear-gradient(135deg,#e8f5e9,#c8e6c9);border-left:4px solid var(--color-soft-green);border-radius:var(--radius-md);font-weight:500;color:var(--color-text-main)}@media(max-width:768px){.matching-container,.true-false-buttons{flex-direction:column}}.lesson-view-page{padding:40px 0 80px;min-height:calc(100vh - 80px);background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.container-narrow{max-width:800px;margin:0 auto;padding:0 20px}.lesson-header{margin-bottom:48px}.lesson-meta{display:flex;align-items:center;gap:12px;margin-bottom:16px}.lesson-number-badge{background:linear-gradient(135deg,var(--color-soft-blue),#357abd);color:#fff;padding:6px 16px;border-radius:999px;font-weight:700;font-size:.85rem}.course-name{color:var(--color-text-light);font-weight:600;font-size:.9rem}.lesson-header h1{font-size:2.5rem;color:var(--color-text-main);line-height:1.2;margin-bottom:24px}.step-progress{display:flex;align-items:center;gap:16px}.step-progress-bar{flex:1;height:8px;background:#e8e8e8;border-radius:999px;overflow:hidden}.step-progress-fill{height:100%;background:linear-gradient(90deg,var(--color-soft-blue),#357abd);border-radius:999px;transition:width .5s ease}.step-counter{font-weight:700;color:var(--color-soft-blue);font-size:.9rem;min-width:100px;text-align:right}.step-container{margin-bottom:32px}.lesson-content{padding:48px;line-height:1.8;font-size:1.1rem}.lesson-heading{color:var(--color-text-main);font-size:1.75rem;margin-top:32px;margin-bottom:16px}.lesson-text{color:var(--color-text-main);margin-bottom:20px}.lesson-list{margin:24px 0;padding-left:24px}.lesson-list li{margin-bottom:12px;color:var(--color-text-main)}.lesson-important{background:linear-gradient(135deg,#fff9e6,#fff3d9);border-left:4px solid var(--color-soft-yellow);padding:20px 24px;border-radius:var(--radius-md);margin:28px 0;font-weight:600;color:var(--color-text-main)}.quiz-step{padding:32px;background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.quiz-header{text-align:center;margin-bottom:32px;padding-bottom:24px;border-bottom:2px solid #f0f0f0}.quiz-header h2{font-size:1.8rem;color:var(--color-text-main);margin-bottom:8px}.quiz-header p{color:var(--color-text-light);font-size:1rem}.quiz-step>button{width:100%;margin-top:24px}.lesson-navigation{display:flex;justify-content:center;margin-top:48px}.lesson-navigation button{min-width:250px}.btn-success{background:linear-gradient(135deg,var(--color-soft-green),#2d9668)}.btn-success:hover{background:linear-gradient(135deg,#2d9668,var(--color-soft-green))}.loading,.error{text-align:center;padding:100px 20px;font-size:1.2rem;color:var(--color-text-light)}@media(max-width:768px){.lesson-header h1{font-size:2rem}.lesson-content,.quiz-step{padding:32px 24px;font-size:1rem}.lesson-heading{font-size:1.5rem}.step-counter{font-size:.8rem;min-width:80px}}.profile-page{padding:80px 0;min-height:calc(100vh - 80px);background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.profile-container{max-width:700px;margin:0 auto}.profile-header{text-align:center;margin-bottom:40px}.profile-avatar{width:120px;height:120px;background:linear-gradient(135deg,var(--color-soft-blue),#357abd);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 24px;color:#fff;box-shadow:var(--shadow-lg)}.profile-header h1{font-size:2.5rem;color:var(--color-text-main)}.profile-content{display:flex;flex-direction:column;gap:24px}.profile-info-card{padding:32px}.profile-info-card h2{margin-bottom:24px;font-size:1.5rem;color:var(--color-text-main)}.info-row{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid #f0f0f0}.info-row:last-child{border-bottom:none}.info-label{display:flex;align-items:center;gap:12px;color:var(--color-text-light);font-weight:600}.info-value{color:var(--color-text-main);font-weight:500}.profile-actions{display:flex;justify-content:center}.profile-actions button{min-width:200px}.custom-select-container{position:relative;width:100%;min-width:150px}.custom-select-trigger{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#fafafa;border:2px solid #e8e8e8;border-radius:var(--radius-md);cursor:pointer;font-size:1rem;transition:all .2s;-webkit-user-select:none;user-select:none}.custom-select-trigger:hover{background:#fff;border-color:#d0d0d0}.custom-select-trigger.open{background:#fff;border-color:var(--color-soft-blue);box-shadow:0 0 0 3px #4687e81a}.chevron{transition:transform .2s ease;color:var(--color-text-light)}.chevron.rotate{transform:rotate(180deg)}.custom-select-options{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border-radius:var(--radius-md);box-shadow:var(--shadow-lg);list-style:none;padding:8px;z-index:100;border:1px solid rgba(0,0,0,.05);max-height:250px;overflow-y:auto}.custom-select-option{padding:10px 12px;cursor:pointer;border-radius:8px;transition:background .2s;display:flex;justify-content:space-between;align-items:center;font-size:.95rem;color:var(--color-text-main)}.custom-select-option:hover{background:#f5f7fa;color:var(--color-soft-blue)}.custom-select-option.selected{background:#4687e814;color:var(--color-soft-blue);font-weight:600}.simple-editor{border:1px solid #cbd5e1;border-radius:8px;overflow:hidden;background:#fff;transition:all .2s}.simple-editor:focus-within{border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}.editor-toolbar{display:flex;align-items:center;gap:4px;padding:8px;background:#f8fafc;border-bottom:1px solid #e2e8f0}.editor-toolbar button{display:flex;align-items:center;justify-content:center;padding:6px;border-radius:6px;border:none;background:transparent;color:#64748b;cursor:pointer;transition:all .2s}.editor-toolbar button:hover{background:#e2e8f0;color:#1e293b}.editor-toolbar .divider{width:1px;height:20px;background:#cbd5e1;margin:0 4px}.editor-textarea{width:100%;border:none;padding:12px;font-family:inherit;font-size:.95rem;line-height:1.5;resize:vertical;outline:none;min-height:120px;color:#334155}.editor-textarea::placeholder{color:#94a3b8}.lesson-builder{display:flex;flex-direction:column;gap:20px;padding:20px;background:#f8fafc;border-radius:12px;border:1px solid #e2e8f0}.lesson-builder-steps{display:flex;flex-direction:column;gap:20px}.builder-step{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px;position:relative;box-shadow:0 4px 6px -1px #0000000d}.step-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding-bottom:10px;border-bottom:1px solid #f1f5f9}.step-type-badge{padding:6px 12px;border-radius:20px;font-size:.85rem;font-weight:600;text-transform:uppercase}.step-type-content{background:#e0f2fe;color:#0284c7}.step-type-quiz{background:#fef3c7;color:#d97706}.step-controls{display:flex;align-items:center;gap:10px}.remove-btn{color:#ef4444;background:none;border:none;cursor:pointer;padding:8px;border-radius:6px;transition:background .2s}.remove-btn:hover{background:#fee2e2}.step-sections{display:flex;flex-direction:column;gap:15px}.builder-section{border:1px solid #f1f5f9;padding:15px;border-radius:8px;background:#fafafa}.section-label{font-size:.8rem;text-transform:uppercase;color:#64748b;margin-bottom:8px;font-weight:600}.quiz-questions{display:flex;flex-direction:column;gap:20px}.question-builder{border:1px solid #e2e8f0;padding:15px;border-radius:8px;background:#fafafa}.question-type-select{width:100%;padding:10px;border-radius:8px;border:1px solid #cbd5e1;margin-bottom:15px}.options-builder{display:flex;flex-direction:column;gap:10px;margin-top:15px}.option-row{display:flex;align-items:center;gap:10px}.option-input{flex:1}.add-buttons-container{display:flex;gap:10px;margin-top:10px}.add-btn{flex:1;padding:12px;border-radius:8px;border:2px dashed #cbd5e1;background:#fff;cursor:pointer;color:#64748b;font-weight:500;transition:all .2s;display:flex;align-items:center;justify-content:center;gap:8px}.add-btn:hover{border-color:#94a3b8;color:#475569;background:#f8fafc}.ql-container{border-bottom-left-radius:8px;border-bottom-right-radius:8px;background:#fff}.ql-toolbar{border-top-left-radius:8px;border-top-right-radius:8px;background:#f8fafc}.section-controls{display:flex;justify-content:flex-end;margin-top:5px}.admin-dashboard{padding:40px 0;min-height:calc(100vh - 80px);background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.admin-header{margin-bottom:32px;display:flex;align-items:center;gap:16px}.admin-header h1{font-size:2rem;color:var(--color-text-main);margin:0}.admin-section{background:#fff;border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-md);margin-bottom:32px;border:1px solid rgba(0,0,0,.05)}.admin-section h2{font-size:1.5rem;color:var(--color-text-main);margin-bottom:24px;display:flex;align-items:center;gap:10px}.create-user-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;align-items:end}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-weight:600;font-size:.9rem;color:var(--color-text-light)}.form-input,.form-select{padding:12px 16px;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all .2s;background:#fafafa}.form-input:focus,.form-select:focus{outline:none;border-color:var(--color-soft-blue);background:#fff;box-shadow:0 0 0 3px #4687e81a}.search-bar{position:relative;margin-bottom:24px}.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--color-text-light)}.search-input{width:100%;padding:12px 16px 12px 48px;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all .2s;background:#fafafa}.search-input:focus{outline:none;border-color:var(--color-soft-blue);background:#fff;box-shadow:0 0 0 3px #4687e81a}.users-table-container{overflow-x:auto;border-radius:var(--radius-md);border:1px solid #e8e8e8}.users-table{width:100%;border-collapse:collapse;background:#fff}.users-table th{background:#f8f9fa;padding:16px;text-align:left;font-weight:600;color:var(--color-text-light);border-bottom:2px solid #e8e8e8}.users-table td{padding:16px;border-bottom:1px solid #f0f0f0;color:var(--color-text-main)}.users-table tr:last-child td{border-bottom:none}.users-table tr:hover{background-color:#fafafa}.role-badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:.85rem;font-weight:600;text-transform:capitalize}.role-badge.admin{background:#e3f2fd;color:#1976d2}.role-badge.teacher{background:#e8f5e9;color:#2e7d32}.role-badge.student{background:#fff3e0;color:#f57c00}.role-badge.individual{background:#f3e5f5;color:#7b1fa2}.action-btn{padding:8px;border-radius:8px;color:#ef4444;background:#fef2f2;transition:all .2s}.action-btn:hover{background:#fee2e2;transform:scale(1.05)}.role-select{padding:6px 12px;border-radius:6px;border:1px solid #e0e0e0;background:#fff;font-size:.9rem;cursor:pointer}.role-select:focus{border-color:var(--color-soft-blue);outline:none}.teacher-dashboard{padding:40px 0;min-height:calc(100vh - 80px);background:linear-gradient(135deg,#f9f9f9,#eef2f5)}.teacher-header{margin-bottom:32px;display:flex;align-items:center;gap:16px}.teacher-header h1{font-size:2rem;color:var(--color-text-main);margin:0}.teacher-section{background:#fff;border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-md);margin-bottom:32px;border:1px solid rgba(0,0,0,.05)}.teacher-section h2{font-size:1.5rem;color:var(--color-text-main);margin-bottom:24px;display:flex;align-items:center;gap:10px}.create-class-form{display:flex;gap:16px;align-items:center}.create-class-form .form-input{flex:1;padding:12px 16px;border:2px solid #e8e8e8;border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all .2s;background:#fafafa}.create-class-form .form-input:focus{outline:none;border-color:var(--color-soft-blue);background:#fff;box-shadow:0 0 0 3px #4687e81a}.classes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}.class-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);border:1px solid #e8e8e8;transition:all .3s ease;display:flex;flex-direction:column}.class-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--color-soft-blue)}.class-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px}.class-name{font-size:1.25rem;font-weight:700;color:var(--color-text-main);margin:0}.student-count{display:flex;align-items:center;gap:6px;font-size:.9rem;color:var(--color-text-light);background:#f5f7fa;padding:4px 12px;border-radius:20px}.students-list-container{margin-top:16px;border-top:1px solid #f0f0f0;padding-top:16px}.students-list-summary{cursor:pointer;color:var(--color-soft-blue);font-weight:600;display:flex;align-items:center;gap:8px;-webkit-user-select:none;user-select:none;list-style:none}.students-list-summary::-webkit-details-marker{display:none}.students-list{margin-top:12px;list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}.student-item{display:flex;align-items:center;gap:10px;padding:8px 12px;background:#f9f9f9;border-radius:8px;font-size:.9rem;color:var(--color-text-main)}.empty-state{text-align:center;padding:40px;color:var(--color-text-light);grid-column:1 / -1;background:#f9f9f9;border-radius:var(--radius-lg);border:2px dashed #e0e0e0}.notification-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:12px;pointer-events:none}.notification-item{pointer-events:auto;display:flex;align-items:center;width:380px;max-width:calc(100vw - 48px);background:#ffffffe6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:16px;padding:16px;box-shadow:0 10px 40px -10px #0000001a,0 0 0 1px #ffffff80 inset;overflow:hidden;position:relative;transform-origin:bottom right}.dark-mode .notification-item{background:#1e293be6;box-shadow:0 10px 40px -10px #0000004d,0 0 0 1px #ffffff1a inset;color:#fff}.notification-icon{display:flex;align-items:center;justify-content:center;margin-right:14px;flex-shrink:0}.notification-content{flex:1;margin-right:12px}.notification-content p{margin:0;font-size:.95rem;font-weight:500;line-height:1.4;color:#1e293b}.dark-mode .notification-content p{color:#f1f5f9}.notification-close{background:transparent;border:none;color:#94a3b8;cursor:pointer;padding:4px;border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all .2s}.notification-close:hover{background:#0000000d;color:#64748b}.dark-mode .notification-close:hover{background:#ffffff1a;color:#cbd5e1}.notification-item.success .notification-icon{color:#10b981}.notification-item.error .notification-icon{color:#ef4444}.notification-item.warning .notification-icon{color:#f59e0b}.notification-item.info .notification-icon{color:#3b82f6}.notification-progress{position:absolute;bottom:0;left:0;height:3px;width:100%;background-color:currentColor;opacity:.3;animation:progress 5s linear forwards;transform-origin:left}.notification-item.success .notification-progress{background-color:#10b981}.notification-item.error .notification-progress{background-color:#ef4444}.notification-item.warning .notification-progress{background-color:#f59e0b}.notification-item.info .notification-progress{background-color:#3b82f6}@keyframes progress{0%{transform:scaleX(1)}to{transform:scaleX(0)}}@media(max-width:640px){.notification-container{bottom:16px;right:16px;left:16px;align-items:center}.notification-item{width:100%}}:root{--color-white: #ffffff;--color-light-gray: #f2f2f2;--color-soft-blue: #4687e8;--color-soft-green: #41b883;--color-soft-yellow: #f5c542;--color-text-main: #2c3e50;--color-text-light: #7f8c8d;--color-bg: #f9f9f9;--font-family: "Inter", system-ui, Avenir, Helvetica, Arial, sans-serif;--shadow-sm: 0 2px 4px rgba(0,0,0,.05);--shadow-md: 0 4px 6px rgba(0,0,0,.07);--shadow-lg: 0 10px 15px rgba(0,0,0,.1);--shadow-hover: 0 15px 25px rgba(70, 135, 232, .15);--radius-md: 12px;--radius-lg: 20px;--radius-full: 9999px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text-main);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;font-family:inherit}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:.5em}.container{max-width:1200px;margin:0 auto;padding:0 20px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:var(--radius-md);font-weight:600;font-size:1rem;transition:all .3s ease;gap:8px}.btn-primary{background-color:var(--color-soft-blue);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);background-color:#357abd}.btn-secondary{background-color:#fff;color:var(--color-soft-blue);border:2px solid var(--color-soft-blue)}.btn-secondary:hover{background-color:var(--color-soft-blue);color:#fff}.btn-large{padding:16px 32px;font-size:1.2rem;border-radius:var(--radius-lg)}.card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);transition:transform .3s ease,box-shadow .3s ease;border:1px solid rgba(0,0,0,.03)}.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}.text-center{text-align:center}.mt-4{margin-top:1rem}.mb-4{margin-bottom:1rem}.flex-center{display:flex;align-items:center;justify-content:center}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .6s ease-out forwards}