:root{--primary-gradient:linear-gradient(135deg,#667eea,#764ba2);--secondary-gradient:linear-gradient(135deg,#f093fb,#f5576c);--success-gradient:linear-gradient(135deg,#11998e,#38ef7d);--warning-gradient:linear-gradient(135deg,#f2994a,#f2c94c);--danger-gradient:linear-gradient(135deg,#eb3349,#f45c43);--primary-color:#667eea;--secondary-color:#764ba2;--success-color:#38ef7d;--warning-color:#f2c94c;--danger-color:#f45c43;--bg-light:#f0f4f8;--bg-card:#fff;--text-dark:#2d3748;--text-light:#718096;--border-radius:20px;--shadow:0 10px 40px #0000001a;--shadow-hover:0 20px 60px #00000026}*{box-sizing:border-box;margin:0;padding:0}body{background-color:#f0f4f8;background-color:var(--bg-light);color:#2d3748;color:var(--text-dark);font-family:Nunito,sans-serif}.app,body{min-height:100vh}.app{display:flex;flex-direction:column}.navbar{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);box-shadow:0 10px 40px #0000001a;box-shadow:var(--shadow);justify-content:space-between;padding:1rem 2rem;position:-webkit-sticky;position:sticky;top:0;z-index:100}.navbar,.navbar-brand{align-items:center;display:flex}.navbar-brand{color:#fff;font-size:1.8rem;font-weight:800;gap:.5rem;text-decoration:none}.navbar-brand:hover{transform:scale(1.05);transition:transform .3s ease}.navbar-nav{align-items:center;display:flex;gap:1rem}.nav-link{background:#ffffff1a;border-radius:50px;color:#fff;font-weight:600;padding:.75rem 1.5rem;text-decoration:none;transition:all .3s ease}.nav-link:hover{background:#ffffff40;transform:translateY(-2px)}.nav-link.active{background:#fff;color:#667eea;color:var(--primary-color)}.user-info{color:#fff;gap:1rem}.user-avatar,.user-info{align-items:center;display:flex}.user-avatar{background:#fff;border-radius:50%;font-size:1.5rem;height:45px;justify-content:center;width:45px}.main-content{flex:1 1;margin:0 auto;max-width:1400px;padding:2rem;width:100%}.card{background:#fff;background:var(--bg-card);border:3px solid #0000;border-radius:20px;border-radius:var(--border-radius);box-shadow:0 10px 40px #0000001a;box-shadow:var(--shadow);margin-bottom:1.5rem;padding:2rem;transition:all .3s ease}.card:hover{box-shadow:0 20px 60px #00000026;box-shadow:var(--shadow-hover);transform:translateY(-5px)}.card-colorful{border-image:linear-gradient(135deg,#667eea,#764ba2) 1;border-image:var(--primary-gradient) 1}.card-title{color:#2d3748;color:var(--text-dark);font-size:1.5rem;font-weight:700;margin-bottom:1rem}.card-subtitle{color:#718096;color:var(--text-light);font-size:1rem;margin-bottom:1.5rem}.btn{align-items:center;border:none;border-radius:50px;cursor:pointer;display:inline-flex;font-size:1rem;font-weight:700;gap:.5rem;justify-content:center;padding:.875rem 2rem;text-decoration:none;transition:all .3s ease}.btn:hover{box-shadow:0 10px 30px #0003;transform:translateY(-3px)}.btn:active{transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);color:#fff}.btn-secondary{background:linear-gradient(135deg,#f093fb,#f5576c);background:var(--secondary-gradient);color:#fff}.btn-success{background:linear-gradient(135deg,#11998e,#38ef7d);background:var(--success-gradient);color:#fff}.btn-warning{background:linear-gradient(135deg,#f2994a,#f2c94c);background:var(--warning-gradient);color:#fff}.btn-danger{background:linear-gradient(135deg,#eb3349,#f45c43);background:var(--danger-gradient);color:#fff}.btn-outline{background:#0000;border:3px solid #667eea;border:3px solid var(--primary-color);color:#667eea;color:var(--primary-color)}.btn-outline:hover{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);border-color:#0000;color:#fff}.btn-lg{font-size:1.25rem;padding:1.25rem 3rem}.btn-sm{font-size:.875rem;padding:.5rem 1rem}.form-group{margin-bottom:1.5rem}.form-label{color:#2d3748;color:var(--text-dark);display:block;font-size:1.1rem;font-weight:700;margin-bottom:.5rem}.form-input{border:3px solid #e2e8f0;border-radius:15px;font-family:inherit;font-size:1rem;padding:1rem 1.5rem;transition:all .3s ease;width:100%}.form-input:focus{border-color:#667eea;border-color:var(--primary-color);box-shadow:0 0 0 4px #667eea33;outline:none}.form-input::placeholder{color:#a0aec0}textarea.form-input{min-height:120px;resize:vertical}.form-select{background:#fff;border:3px solid #e2e8f0;border-radius:15px;cursor:pointer;font-family:inherit;font-size:1rem;padding:1rem 1.5rem;width:100%}.exam-card{background:linear-gradient(145deg,#fff,#f7fafc);border-image:linear-gradient(135deg,#667eea,#764ba2) 1;border-image:var(--primary-gradient) 1;border-left:6px solid}.exam-card .exam-emoji{font-size:3rem;margin-bottom:1rem}.exam-info{display:flex;flex-wrap:wrap;gap:2rem;margin:1rem 0}.exam-info-item{align-items:center;color:#718096;color:var(--text-light);display:flex;font-weight:600;gap:.5rem}.exam-info-item .icon{font-size:1.25rem}.question-card{background:#fff;border-left:6px solid;border-radius:20px;border-radius:var(--border-radius);box-shadow:0 10px 40px #0000001a;box-shadow:var(--shadow);margin-bottom:1.5rem;padding:2rem}.question-card.mcq{border-color:#667eea}.question-card.subjective{border-color:#f093fb}.question-number{align-items:center;background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);border-radius:50%;color:#fff;display:inline-flex;font-weight:700;height:40px;justify-content:center;margin-right:1rem;width:40px}.question-text{font-size:1.25rem;font-weight:600;line-height:1.6;margin-bottom:1rem}.question-marks{background:linear-gradient(135deg,#f2994a,#f2c94c);background:var(--warning-gradient);border-radius:20px;color:#fff;display:inline-block;font-size:.875rem;font-weight:700;margin-bottom:1rem;padding:.25rem .75rem}.answer-options{grid-gap:1rem;display:grid;gap:1rem;margin-top:1rem}.answer-option{align-items:center;border:3px solid #e2e8f0;border-radius:15px;cursor:pointer;display:flex;font-weight:600;gap:1rem;padding:1rem 1.5rem;transition:all .3s ease}.answer-option:hover{background:#667eea0d}.answer-option.selected,.answer-option:hover{border-color:#667eea;border-color:var(--primary-color)}.answer-option.selected{background:#667eea1a}.answer-option.correct{background:#38ef7d1a;border-color:#38ef7d;border-color:var(--success-color)}.answer-option.incorrect{background:#f45c431a;border-color:#f45c43;border-color:var(--danger-color)}.answer-radio{align-items:center;border:3px solid #cbd5e0;border-radius:50%;display:flex;height:24px;justify-content:center;transition:all .3s ease;width:24px}.answer-option.selected .answer-radio{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);border-color:#667eea;border-color:var(--primary-color)}.answer-option.selected .answer-radio:after{color:#fff;content:"✓";font-weight:700}.score-display{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);border-radius:20px;border-radius:var(--border-radius);color:#fff;margin-bottom:2rem;padding:3rem;text-align:center}.score-number{font-size:5rem;font-weight:800;line-height:1}.score-label{font-size:1.5rem;margin-top:.5rem;opacity:.9}.score-emoji{font-size:4rem;margin-bottom:1rem}.grid{grid-gap:1.5rem;display:grid;gap:1.5rem}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}.badge{align-items:center;border-radius:20px;display:inline-flex;font-size:.875rem;font-weight:700;gap:.25rem;padding:.5rem 1rem}.badge-success{background:#38ef7d33;color:#059669}.badge-warning{background:#f2c94c33;color:#d97706}.badge-danger{background:#f45c4333;color:#dc2626}.badge-info{background:#667eea33;color:#667eea}.progress-bar{background:#e2e8f0;border-radius:10px;height:20px;margin:1rem 0;overflow:hidden}.progress-fill{background:linear-gradient(135deg,#11998e,#38ef7d);background:var(--success-gradient);border-radius:10px;height:100%;transition:width .5s ease}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes shake{0%,to{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}.animate-bounce{animation:bounce 1s ease infinite}.animate-pulse{animation:pulse 2s ease 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th{background:linear-gradient(135deg,#667eea,#764ba2);background:var(--primary-gradient);color:#fff;font-weight:700}.table tr:hover{background:#667eea0d}.empty-state{color:#718096;color:var(--text-light);padding:4rem 2rem;text-align:center}.empty-state-emoji{font-size:5rem;margin-bottom:1rem}.empty-state-title{color:#2d3748;color:var(--text-dark);font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.loading{align-items:center;display:flex;justify-content:center;padding:3rem}.spinner{animation:spin 1s linear infinite;border:5px solid #e2e8f0;border-radius:50%;border-top:5px solid var(--primary-color);height:50px;width:50px}@keyframes spin{to{transform:rotate(1turn)}}.alert{border-radius:15px;font-weight:600;margin-bottom:1rem;padding:1rem 1.5rem}.alert-error{background:#f45c431a;border:2px solid #f45c434d;color:#dc2626}.alert-success{background:#38ef7d1a;border:2px solid #38ef7d4d;color:#059669}.modal-overlay{align-items:center;background:#00000080;bottom:0;display:flex;justify-content:center;left:0;padding:2rem;position:fixed;right:0;top:0;z-index:1000}.modal{background:#fff;border-radius:20px;border-radius:var(--border-radius);box-shadow:0 20px 60px #00000026;box-shadow:var(--shadow-hover);max-height:90vh;max-width:600px;overflow-y:auto;padding:2rem;width:100%}.modal-header{align-items:center;display:flex;justify-content:space-between;margin-bottom:1.5rem}.modal-title{font-size:1.5rem;font-weight:700}.modal-close{background:none;border:none;color:#718096;color:var(--text-light);cursor:pointer;font-size:1.5rem}@media (max-width:768px){.navbar{flex-direction:column;gap:1rem;padding:1rem}.navbar-nav{flex-wrap:wrap;justify-content:center}.main-content{padding:1rem}.card{padding:1.5rem}.exam-info{flex-direction:column;gap:.5rem}.btn-lg{width:100%}}.stars{z-index:-1}.confetti,.stars{pointer-events:none;position:fixed}.confetti{z-index:1000}
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