.auth-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--spacing-xl);position:relative;overflow:hidden}.auth-container:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 70%);animation:pulse 20s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:.5}50%{transform:scale(1.1);opacity:.8}}.auth-card{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-2xl);padding:var(--spacing-3xl);box-shadow:var(--shadow-2xl);width:100%;max-width:450px;position:relative;z-index:1;border:1px solid rgba(255,255,255,.1);animation:slideUp .5s ease-out}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.auth-card h1{color:var(--white);margin-bottom:var(--spacing-2xl);text-align:center;font-size:2.5rem;font-weight:700;letter-spacing:-1px}.form-group{margin-bottom:var(--spacing-lg)}.form-group label{display:block;margin-bottom:var(--spacing-sm);color:var(--gray-200);font-weight:600;font-size:.95rem}.form-group input{width:100%;padding:1rem 1.25rem;border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);font-size:1rem;transition:all var(--transition-base);background:var(--bg-secondary);color:var(--white);font-family:inherit}.form-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb33;transform:translateY(-1px);background:var(--bg-tertiary)}.form-group input::placeholder{color:var(--gray-500)}.submit-btn{width:100%;padding:1rem;background:var(--primary);color:var(--white);border:none;border-radius:var(--radius-md);font-size:1.05rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);margin-top:var(--spacing-md);box-shadow:var(--shadow-md);position:relative;overflow:hidden}.submit-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);transition:left .5s}.submit-btn:hover:not(:disabled):before{left:100%}.submit-btn:active:not(:disabled){transform:translateY(0)}.error-message{background:#ef444433;color:var(--error);padding:1rem;border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);text-align:center;font-weight:500;border:1px solid rgba(239,68,68,.3);animation:shake .5s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-10px)}75%{transform:translate(10px)}}.auth-link{text-align:center;margin-top:var(--spacing-2xl);color:var(--gray-300);font-size:.95rem}.auth-link a{color:var(--primary);text-decoration:none;font-weight:600;transition:all var(--transition-fast);position:relative}.auth-link a:after{content:"";position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--primary);transition:width var(--transition-base)}.auth-link a:hover:after{width:100%}@media (max-width: 768px){.auth-container{padding:var(--spacing-md)}.auth-card{padding:var(--spacing-2xl)}.auth-card h1{font-size:2rem}}.dashboard{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl);position:relative}.container{max-width:1400px;margin:0 auto}.dashboard-header{text-align:center;margin-bottom:var(--spacing-3xl);color:var(--white);animation:fadeInDown .6s ease-out}.dashboard-header h1{font-size:clamp(2rem,5vw,3.5rem);margin-bottom:var(--spacing-md);text-shadow:0 4px 20px rgba(0,0,0,.2);font-weight:700;letter-spacing:-1px;background:linear-gradient(135deg,#fff,#fffc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.dashboard-header p{font-size:1.25rem;opacity:.95;font-weight:400;text-shadow:0 2px 10px rgba(0,0,0,.1)}.admin-actions{display:flex;gap:var(--spacing-md);justify-content:center;margin-bottom:var(--spacing-3xl);flex-wrap:wrap}.courses-grid{display:flex;flex-direction:column;gap:var(--spacing-lg);animation:fadeInUp .6s ease-out .2s both}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.course-card{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-xl);text-decoration:none;color:var(--white);box-shadow:0 8px 32px #0006,0 2px 8px #0003;transition:all var(--transition-base);display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:var(--spacing-xl);border:1px solid rgba(255,255,255,.1);position:relative;overflow:hidden}.course-card:before{content:"";position:absolute;top:0;left:0;bottom:0;width:4px;background:var(--primary);transform:scaleY(0);transform-origin:top;transition:transform var(--transition-base)}.course-card:hover:before{transform:scaleY(1)}.course-card:hover{transform:translate(4px);box-shadow:0 12px 48px #00000080,0 4px 16px #2563eb4d;background:var(--bg-card-hover);border-color:#2563eb4d}.course-card-content{flex:1;display:flex;flex-direction:column;gap:var(--spacing-sm);min-width:0}.course-card h3{color:var(--white);margin:0;font-size:1.5rem;font-weight:700;line-height:1.3}.course-card p{color:var(--gray-300);margin:0;line-height:1.6;font-size:.95rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.course-meta{margin-top:var(--spacing-sm);color:var(--gray-400);font-size:.9rem;font-weight:500;display:flex;align-items:center;gap:var(--spacing-md)}.course-meta span{display:flex;align-items:center;gap:.5rem}.course-actions{display:flex;gap:var(--spacing-md);flex-shrink:0;align-items:center}.loading-container{min-height:calc(100vh - 80px);display:flex;align-items:center;justify-content:center}.spinner{width:60px;height:60px;border:4px solid rgba(255,255,255,.2);border-top-color:var(--white);border-radius:50%;animation:spin .8s linear infinite;box-shadow:var(--shadow-md)}@keyframes spin{to{transform:rotate(360deg)}}.error-message{background:#ef444433;color:var(--error);padding:1rem 1.5rem;border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);text-align:center;font-weight:500;border:1px solid rgba(239,68,68,.3);box-shadow:var(--shadow-sm)}.success-message{background:#10b98133;color:var(--success);padding:1rem 1.5rem;border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);text-align:center;font-weight:500;border:1px solid rgba(16,185,129,.3);box-shadow:var(--shadow-sm)}@media (max-width: 768px){.dashboard{padding:var(--spacing-2xl) var(--spacing-md)}.dashboard-header h1{font-size:2rem}.course-card{flex-direction:column;align-items:flex-start;padding:var(--spacing-lg)}.course-actions{width:100%;justify-content:flex-end}}.course-detail{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.course-header{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-3xl);margin-bottom:var(--spacing-3xl);box-shadow:var(--shadow-xl);border:1px solid rgba(255,255,255,.1);animation:fadeInDown .6s ease-out}.course-header h1{color:var(--white);margin-bottom:var(--spacing-md);font-size:clamp(2rem,4vw,2.75rem);font-weight:700;letter-spacing:-1px;line-height:1.2}.course-description{color:var(--gray-300);font-size:1.15rem;line-height:1.7;margin-bottom:var(--spacing-md)}.course-author{color:var(--gray-400);font-size:.95rem;font-weight:500;display:flex;align-items:center;gap:var(--spacing-sm)}.evaluations-section{margin-top:var(--spacing-2xl);animation:fadeInUp .6s ease-out .2s both}.evaluations-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-2xl);flex-wrap:wrap;gap:var(--spacing-md)}.evaluations-header h2{color:var(--white);font-size:clamp(1.75rem,3vw,2.5rem);text-shadow:0 4px 20px rgba(0,0,0,.2);margin:0;font-weight:700;letter-spacing:-.5px}.create-evaluation-btn{display:inline-flex;align-items:center;gap:var(--spacing-sm);padding:1rem 2rem;background:var(--primary);color:var(--white);text-decoration:none;border-radius:var(--radius-full);font-weight:600;transition:all var(--transition-fast);white-space:nowrap;box-shadow:var(--shadow-lg)}.create-evaluation-btn:hover{transform:translateY(-3px) scale(1.05);box-shadow:var(--shadow-xl)}.evaluations-grid{display:flex;flex-direction:column;gap:var(--spacing-lg)}.evaluation-card{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;transition:all var(--transition-base);border:1px solid rgba(255,255,255,.1);position:relative;overflow:hidden;display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:var(--spacing-xl)}.evaluation-card:before{content:"";position:absolute;top:0;left:0;bottom:0;width:4px;background:var(--primary);transform:scaleY(0);transform-origin:top;transition:transform var(--transition-base)}.evaluation-card:hover:before{transform:scaleY(1)}.evaluation-card:hover{transform:translate(4px);box-shadow:0 12px 48px #00000080,0 4px 16px #2563eb4d;background:var(--bg-card-hover);border-color:#2563eb4d}.evaluation-card-content{flex:1;display:flex;flex-direction:column;gap:var(--spacing-sm);min-width:0}.evaluation-card h3{color:var(--white);margin:0;font-size:1.5rem;font-weight:700;line-height:1.3}.evaluation-card p{color:var(--gray-300);margin:0;line-height:1.6;font-size:.95rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.evaluation-meta{margin-top:var(--spacing-sm);color:var(--gray-400);font-size:.9rem;font-weight:500;display:flex;align-items:center;gap:var(--spacing-md)}.take-evaluation-btn{display:inline-flex;align-items:center;justify-content:center;padding:1rem 2rem;background:var(--primary);color:var(--white);text-decoration:none;border-radius:var(--radius-full);font-weight:600;transition:all var(--transition-fast);box-shadow:0 4px 12px #2563eb66;white-space:nowrap}.take-evaluation-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #2563eb80;background:var(--primary-light)}.admin-evaluation-actions{display:flex;gap:var(--spacing-md);flex-wrap:wrap}.edit-evaluation-btn,.view-submissions-btn{display:inline-flex;align-items:center;justify-content:center;padding:.875rem 1.75rem;color:var(--white);text-decoration:none;border-radius:var(--radius-full);font-weight:600;transition:all var(--transition-fast);font-size:.95rem;box-shadow:0 4px 12px #2563eb66;white-space:nowrap}.edit-evaluation-btn{background:var(--primary)}.edit-evaluation-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.view-submissions-btn{background:var(--primary-dark)}.view-submissions-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.error-state a{text-decoration:none;font-weight:600;padding:.75rem 1.5rem;background:var(--primary);color:var(--white);border-radius:var(--radius-full);display:inline-block;transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.error-state a:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.empty-state p{font-size:1.25rem;margin-bottom:var(--spacing-lg);color:var(--gray-300);font-weight:500}@media (max-width: 768px){.course-detail{padding:var(--spacing-2xl) var(--spacing-md)}.evaluation-card{flex-direction:column;align-items:flex-start;padding:var(--spacing-lg)}.course-actions{width:100%;justify-content:flex-end}.course-header{padding:var(--spacing-2xl)}.course-header h1{font-size:2rem}.evaluations-header{flex-direction:column;gap:var(--spacing-md);align-items:flex-start}.create-evaluation-btn{width:100%;text-align:center;justify-content:center}.admin-evaluation-actions{flex-direction:column}.edit-evaluation-btn,.view-submissions-btn{width:100%}}.evaluation-form{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.evaluation-header{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-3xl);margin-bottom:var(--spacing-3xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;border:1px solid rgba(255,255,255,.1);animation:fadeInDown .6s ease-out}.evaluation-header h1{color:var(--white);margin-bottom:var(--spacing-md);font-size:clamp(2rem,4vw,2.75rem);font-weight:700;letter-spacing:-1px;line-height:1.2}.evaluation-header p{color:var(--gray-300);font-size:1.15rem;margin-bottom:var(--spacing-sm);line-height:1.6}.course-info{color:var(--gray-400);font-size:.95rem;font-weight:500;display:flex;align-items:center;gap:var(--spacing-sm)}.evaluation-form-content{max-width:900px;margin:0 auto;animation:fadeInUp .6s ease-out .2s both}.question-card{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-2xl);margin-bottom:var(--spacing-2xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;border:1px solid rgba(255,255,255,.1);transition:all var(--transition-base);position:relative;overflow:hidden}.question-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--transition-base)}.question-card:focus-within:before{transform:scaleX(1)}.question-card:focus-within{box-shadow:0 12px 48px #00000080,0 4px 16px #2563eb4d;border-color:#2563eb4d}.question-text{color:var(--white);margin-bottom:var(--spacing-lg);font-size:1.25rem;line-height:1.7;font-weight:500}.question-options{display:flex;flex-direction:column;gap:var(--spacing-md)}.option-label{display:flex;align-items:center;gap:var(--spacing-md);padding:1.25rem;border:2px solid rgba(255,255,255,.1);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);background:var(--bg-secondary)}.option-label:hover{border-color:var(--primary);background:#2563eb1a;transform:translate(4px);box-shadow:0 4px 12px #2563eb33}.option-label:has(input:checked){border-color:var(--primary);background:#2563eb33;box-shadow:0 0 0 4px #2563eb1a,0 4px 12px #2563eb4d}.option-label input[type=radio],.option-label input[type=checkbox]{width:22px;height:22px;cursor:pointer;accent-color:var(--primary);flex-shrink:0}.option-label span{flex:1;color:var(--white);font-size:1rem;line-height:1.5}.text-answer{width:100%;padding:1.25rem;border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);font-size:1rem;font-family:inherit;resize:vertical;transition:all var(--transition-base);background:var(--bg-secondary);color:var(--white);line-height:1.6;min-height:150px}.text-answer:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb33;transform:translateY(-1px);background:var(--bg-tertiary)}.text-answer::placeholder{color:var(--gray-500)}.submit-btn{background:var(--primary);color:var(--white);box-shadow:0 4px 12px #2563eb66}.error-message{background:#ef444433;color:var(--error);padding:1rem 1.5rem;border-radius:var(--radius-md);margin-bottom:var(--spacing-2xl);text-align:center;font-weight:500;border:1px solid rgba(239,68,68,.3);animation:shake .5s ease-in-out}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .3s ease-out}.modal-dialog{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:0;max-width:500px;width:90%;box-shadow:0 20px 60px #00000080,0 4px 16px #0000004d;border:1px solid rgba(255,255,255,.1);animation:slideUp .3s ease-out;overflow:hidden}.modal-header{padding:var(--spacing-2xl);border-bottom:1px solid rgba(255,255,255,.1);background:#ef44441a}.modal-header h2{color:var(--error);margin:0;font-size:1.5rem;font-weight:700}.modal-body{padding:var(--spacing-2xl)}.modal-body p{color:var(--white);font-size:1.1rem;line-height:1.6;margin:0}.modal-footer{padding:var(--spacing-xl) var(--spacing-2xl);border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:flex-end;gap:var(--spacing-md)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}@media (max-width: 768px){.evaluation-form{padding:var(--spacing-2xl) var(--spacing-md)}.evaluation-header{padding:var(--spacing-2xl)}.evaluation-header h1{font-size:2rem}.question-card{padding:var(--spacing-lg)}.form-actions{flex-direction:column}.cancel-btn,.submit-btn{width:100%}.modal-dialog{width:95%;margin:var(--spacing-md)}.modal-header,.modal-body,.modal-footer{padding:var(--spacing-lg)}}.admin-dashboard{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl);position:relative}.admin-header{text-align:center;margin-bottom:var(--spacing-3xl);color:var(--white);animation:fadeInDown .6s ease-out}.admin-header h1{font-size:clamp(2rem,5vw,3.5rem);margin-bottom:var(--spacing-2xl);text-shadow:0 4px 20px rgba(0,0,0,.2);font-weight:700;letter-spacing:-1px;background:linear-gradient(135deg,#fff,#fffc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.admin-actions{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap}.action-btn{padding:1rem 2rem;border-radius:var(--radius-full);text-decoration:none;font-weight:600;transition:all var(--transition-fast);display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);font-size:1rem;border:none;cursor:pointer;position:relative;overflow:hidden}.action-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#fff3;transform:translate(-50%,-50%);transition:width .6s,height .6s}.action-btn:hover:before{width:300px;height:300px}.action-btn.primary{background:var(--primary);color:var(--white);box-shadow:var(--shadow-lg);z-index:1}.action-btn.primary:hover{transform:translateY(-3px) scale(1.02);box-shadow:var(--shadow-xl)}.action-btn.secondary{background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--white);border:2px solid rgba(255,255,255,.3);z-index:1}.action-btn.secondary:hover{background:#ffffff40;border-color:#ffffff80;transform:translateY(-3px) scale(1.02)}.admin-sections{display:flex;flex-direction:column;gap:var(--spacing-3xl);animation:fadeInUp .6s ease-out .2s both}.admin-section h2{color:var(--white);margin-bottom:var(--spacing-2xl);font-size:clamp(1.75rem,3vw,2.5rem);text-shadow:0 4px 20px rgba(0,0,0,.2);font-weight:700;letter-spacing:-.5px}.items-grid{display:flex;flex-direction:column;gap:var(--spacing-lg)}.item-card{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;transition:all var(--transition-base);border:1px solid rgba(255,255,255,.1);position:relative;overflow:hidden;display:flex;flex-direction:row;align-items:center;justify-content:space-between;gap:var(--spacing-xl)}.item-card:before{content:"";position:absolute;top:0;left:0;bottom:0;width:4px;background:var(--primary);transform:scaleY(0);transform-origin:top;transition:transform var(--transition-base)}.item-card:hover:before{transform:scaleY(1)}.item-card:hover{transform:translate(4px);box-shadow:0 12px 48px #00000080,0 4px 16px #2563eb4d;background:var(--bg-card-hover);border-color:#2563eb4d}.item-card-content{flex:1;display:flex;flex-direction:column;gap:var(--spacing-sm);min-width:0}.item-card h3{color:var(--white);margin:0;font-size:1.5rem;font-weight:700;line-height:1.3}.item-card p{color:var(--gray-300);margin:0;line-height:1.6;font-size:.95rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.item-meta{margin-top:var(--spacing-sm);color:var(--gray-400);font-size:.9rem;display:flex;flex-direction:row;gap:var(--spacing-md);font-weight:500}.item-actions{display:flex;gap:var(--spacing-md);flex-shrink:0;align-items:center}.view-btn{display:inline-flex;align-items:center;justify-content:center;padding:1rem 2rem;background:var(--primary);color:var(--white);text-decoration:none;border-radius:var(--radius-full);font-weight:600;transition:all var(--transition-fast);box-shadow:0 4px 12px #2563eb66;white-space:nowrap}.view-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.empty-state{grid-column:1 / -1;text-align:center;padding:var(--spacing-3xl) var(--spacing-2xl);background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:var(--radius-xl);color:var(--gray-300);box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.1)}@media (max-width: 768px){.admin-dashboard{padding:var(--spacing-2xl) var(--spacing-md)}.admin-header h1{font-size:2rem}.item-card{flex-direction:column;align-items:flex-start;padding:var(--spacing-lg)}.item-actions{width:100%;justify-content:flex-end}}.create-course{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.form-card{max-width:800px;margin:0 auto;background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-2xl);padding:var(--spacing-3xl);box-shadow:var(--shadow-2xl);border:1px solid rgba(255,255,255,.1);animation:slideUp .6s ease-out}.form-group input,.form-group textarea{width:100%;padding:1rem 1.25rem;border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);font-size:1rem;font-family:inherit;transition:all var(--transition-base);background:var(--bg-secondary);color:var(--white)}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb33;transform:translateY(-1px);background:var(--bg-tertiary)}.form-actions{display:flex;gap:var(--spacing-md);justify-content:flex-end;margin-top:var(--spacing-2xl);padding-top:var(--spacing-2xl);border-top:2px solid rgba(255,255,255,.1)}@media (max-width: 768px){.create-course{padding:var(--spacing-2xl) var(--spacing-md)}.form-card{padding:var(--spacing-2xl)}.form-card h1{font-size:2rem}.form-actions{flex-direction:column}.cancel-btn,.submit-btn{width:100%}}.create-evaluation{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.form-card{max-width:1000px;margin:0 auto;background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-2xl);padding:var(--spacing-3xl);box-shadow:var(--shadow-2xl);border:1px solid rgba(255,255,255,.1);animation:slideUp .6s ease-out}.form-card h1{color:var(--white);margin-bottom:var(--spacing-2xl);font-size:clamp(2rem,4vw,2.75rem);font-weight:700;letter-spacing:-1px}.form-group{margin-bottom:var(--spacing-2xl)}.form-group label{display:block;margin-bottom:var(--spacing-sm);color:var(--gray-200);font-weight:600;font-size:1.05rem}.form-group input,.form-group textarea,.form-group select{width:100%;padding:1rem 1.25rem;border:2px solid 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var(--transition-fast)}.option-editor:hover{border-color:var(--primary);box-shadow:var(--shadow-sm)}.correct-checkbox{width:24px;height:24px;cursor:pointer;accent-color:var(--primary);flex-shrink:0}.option-input{flex:1;padding:.875rem 1rem;border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);font-size:1rem;transition:all var(--transition-base);background:var(--bg-secondary);color:var(--white)}.option-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb33;background:var(--bg-tertiary)}.remove-option-btn{width:36px;height:36px;background:var(--error);color:var(--white);border:none;border-radius:50%;font-size:1.25rem;cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);flex-shrink:0}.remove-option-btn:hover{transform:scale(1.1);box-shadow:var(--shadow-md)}.add-option-btn{padding:.75rem 1.5rem;background:var(--primary);color:var(--white);border:none;border-radius:var(--radius-full);font-weight:600;cursor:pointer;transition:all var(--transition-fast);box-shadow:var(--shadow-sm);display:inline-flex;align-items:center;gap:var(--spacing-sm)}.add-option-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);background:var(--primary-dark)}.form-actions{display:flex;gap:var(--spacing-md);justify-content:flex-end;margin-top:var(--spacing-3xl);padding-top:var(--spacing-2xl);border-top:2px solid rgba(255,255,255,.1)}.cancel-btn,.submit-btn{padding:1rem 2rem;border-radius:var(--radius-full);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);border:none;display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm)}.submit-btn{background:var(--primary);color:var(--white);box-shadow:var(--shadow-md)}.submit-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}@media (max-width: 768px){.create-evaluation{padding:var(--spacing-2xl) var(--spacing-md)}.form-card{padding:var(--spacing-2xl)}.form-card h1{font-size:2rem}.questions-header{flex-direction:column;gap:var(--spacing-md);align-items:flex-start}.form-actions{flex-direction:column}.cancel-btn,.submit-btn{width:100%}}.grade-submissions{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.page-header{margin-bottom:var(--spacing-3xl);animation:fadeInDown .6s ease-out}.page-header p{color:#fffffff2;font-size:1.15rem;font-weight:400}.course-name{color:var(--gray-300);font-size:1rem;font-weight:500}.student-name{color:var(--white);font-weight:600;font-size:1.05rem}.pending-count{background:#f59e0b33;color:#fbbf24;padding:.625rem 1.25rem;border-radius:var(--radius-full);font-weight:600;font-size:.9rem;box-shadow:0 2px 8px #f59e0b4d;border:1px solid rgba(245,158,11,.3)}.empty-state p{font-size:1.25rem;margin-bottom:var(--spacing-2xl);color:var(--gray-300);font-weight:500}.action-btn{display:inline-flex;align-items:center;justify-content:center;padding:1rem 2rem;background:var(--primary);color:var(--white);text-decoration:none;border-radius:var(--radius-full);font-weight:600;transition:all var(--transition-fast);box-shadow:0 4px 12px #2563eb66}.action-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}@media (max-width: 768px){.grade-submissions{padding:var(--spacing-2xl) var(--spacing-md)}.submission-header{flex-direction:column;gap:var(--spacing-md)}.submission-meta{align-items:flex-start;text-align:left}.submission-actions{flex-direction:column}.grade-btn{width:100%;text-align:center}}.grade-submission{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.submission-header{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-2xl);margin-bottom:var(--spacing-2xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;border:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;align-items:flex-start;gap:var(--spacing-2xl);flex-wrap:wrap;animation:fadeInDown .6s ease-out}.submission-header h1{color:var(--white);margin-bottom:var(--spacing-sm);font-size:clamp(1.75rem,3vw,2.25rem);font-weight:700;letter-spacing:-.5px}.course-name{color:var(--gray-300);font-size:1.05rem;margin-bottom:var(--spacing-sm);font-weight:500}.student-info{color:var(--white);font-weight:600;margin-bottom:var(--spacing-sm);font-size:1.05rem}.submission-date{color:var(--gray-400);font-size:.95rem;font-weight:500}.score-summary{text-align:right}.score-display{display:flex;flex-direction:column;gap:var(--spacing-sm)}.score-value{color:var(--primary);font-size:2.5rem;font-weight:700;line-height:1;text-shadow:0 0 20px rgba(37,99,235,.5)}.answers-section{display:flex;flex-direction:column;gap:var(--spacing-2xl);animation:fadeInUp .6s ease-out .2s both}.grading-section,.graded-section{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-2xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;border:1px solid rgba(255,255,255,.1)}.grading-section h2,.graded-section h2{color:var(--white);margin-bottom:var(--spacing-lg);font-size:clamp(1.5rem,3vw,2rem);font-weight:700}.answer-card{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-lg);border:2px solid rgba(255,255,255,.1);transition:all var(--transition-base)}.answer-card.grading{border-color:#f59e0b66;background:#f59e0b1a;box-shadow:0 4px 12px #f59e0b33}.answer-card:hover{border-color:var(--primary);box-shadow:0 4px 12px #2563eb4d}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md);padding-bottom:var(--spacing-md);border-bottom:1px solid rgba(255,255,255,.1);flex-wrap:wrap;gap:var(--spacing-sm)}.question-number{font-weight:700;color:var(--white);font-size:1.15rem}.question-type{background:var(--bg-tertiary);padding:.5rem 1rem;border-radius:var(--radius-full);font-size:.85rem;color:var(--gray-200);font-weight:600}.question-text{color:var(--white);margin-bottom:var(--spacing-md);font-size:1.15rem;line-height:1.7;font-weight:500}.answer-content{margin-bottom:var(--spacing-md)}.answer-content label{display:block;color:var(--gray-200);font-weight:600;margin-bottom:var(--spacing-sm);font-size:.95rem}.student-answer{background:var(--bg-tertiary);border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);padding:1.25rem;color:var(--white);min-height:120px;white-space:pre-wrap;word-wrap:break-word;line-height:1.6;transition:all var(--transition-base)}.student-answer:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb33}.selected-option{display:inline-block;background:#2563eb33;color:var(--primary-light);padding:.625rem 1.25rem;border-radius:var(--radius-full);margin:.25rem;font-size:.95rem;font-weight:500;border:1px solid rgba(37,99,235,.3)}.points-display{margin-top:var(--spacing-sm);color:var(--gray-300);font-size:.95rem;font-weight:600}.grading-controls{display:flex;justify-content:space-between;align-items:center;padding-top:var(--spacing-md);border-top:1px solid rgba(255,255,255,.1);margin-top:var(--spacing-md);flex-wrap:wrap;gap:var(--spacing-md)}.grading-controls label{display:flex;align-items:center;gap:var(--spacing-md);color:var(--white);font-weight:600}.grade-input{width:120px;padding:.75rem 1rem;border:2px solid rgba(255,255,255,.2);border-radius:var(--radius-md);font-size:1.1rem;text-align:center;font-weight:600;transition:all var(--transition-base);background:var(--bg-tertiary);color:var(--white)}.grade-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px #2563eb33}.current-grade{color:var(--gray-300);font-size:.95rem;font-weight:500}.form-actions{display:flex;gap:var(--spacing-md);justify-content:flex-end;margin-top:var(--spacing-2xl);padding-top:var(--spacing-2xl);border-top:1px solid rgba(255,255,255,.1)}.cancel-btn,.save-btn{padding:1rem 2rem;border-radius:var(--radius-full);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);border:none;display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm)}.cancel-btn{background:var(--bg-tertiary);color:var(--gray-200);box-shadow:var(--shadow-sm)}.cancel-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);background:var(--gray-600)}.save-btn{background:var(--primary);color:var(--white);box-shadow:0 4px 12px #2563eb66}.save-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg)}.save-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.error-message{background:#ef444433;color:var(--error);padding:1rem 1.5rem;border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);text-align:center;font-weight:500;border:1px solid rgba(239,68,68,.3);animation:shake .5s ease-in-out}.error-state{text-align:center;padding:var(--spacing-3xl) var(--spacing-2xl);background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:var(--radius-xl);color:var(--gray-300);box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.1)}.error-state p{font-size:1.25rem;margin-bottom:var(--spacing-2xl);color:var(--gray-300);font-weight:500}.error-state button{padding:1rem 2rem;background:var(--primary);color:var(--white);border:none;border-radius:var(--radius-full);font-weight:600;cursor:pointer;transition:all var(--transition-fast);box-shadow:0 4px 12px #2563eb66}.error-state button:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}@media (max-width: 768px){.grade-submission{padding:var(--spacing-2xl) var(--spacing-md)}.submission-header{flex-direction:column}.score-summary{text-align:left}.grading-controls{flex-direction:column;align-items:flex-start;gap:var(--spacing-md)}.grade-input{width:100%}.form-actions{flex-direction:column}.cancel-btn,.save-btn{width:100%}}.view-evaluation-submissions{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl)}.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-3xl);gap:var(--spacing-2xl);flex-wrap:wrap;animation:fadeInDown .6s ease-out}.page-header h1{color:var(--white);font-size:clamp(2rem,4vw,2.75rem);margin-bottom:var(--spacing-sm);text-shadow:0 4px 20px rgba(0,0,0,.2);font-weight:700;letter-spacing:-1px}.evaluation-title{color:#fffffff2;font-size:1.25rem;font-weight:500}.back-btn{padding:1rem 2rem;background:var(--primary);color:var(--white);border:none;border-radius:var(--radius-full);font-weight:600;cursor:pointer;transition:all var(--transition-fast);box-shadow:0 4px 12px #2563eb66;display:inline-flex;align-items:center;gap:var(--spacing-sm)}.back-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.submissions-list{display:flex;flex-direction:column;gap:var(--spacing-lg);animation:fadeInUp .6s ease-out .2s both}.submission-item{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-2xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;transition:all var(--transition-base);border:1px solid rgba(255,255,255,.1);position:relative;overflow:hidden}.submission-item:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--transition-base)}.submission-item:hover:before{transform:scaleX(1)}.submission-item:hover{transform:translateY(-4px);box-shadow:0 12px 48px #00000080,0 4px 16px #2563eb4d;border-color:#2563eb4d}.submission-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-lg);gap:var(--spacing-2xl);flex-wrap:wrap}.submission-header h3{color:var(--white);margin-bottom:var(--spacing-sm);font-size:1.75rem;font-weight:700;line-height:1.3}.student-email{color:var(--gray-300);font-size:1rem;font-weight:500}.submission-meta{display:flex;flex-direction:column;gap:var(--spacing-sm);align-items:flex-end;text-align:right}.score-info{display:flex;flex-direction:column;gap:var(--spacing-xs)}.score-label{color:var(--gray-300);font-size:.95rem;font-weight:600}.score-value{color:var(--primary);font-weight:700;font-size:1.5rem;text-shadow:0 0 10px rgba(37,99,235,.5)}.submission-date{color:var(--gray-400);font-size:.9rem;font-weight:500}.submission-actions{display:flex;gap:var(--spacing-md);justify-content:flex-end;padding-top:var(--spacing-lg);border-top:1px solid rgba(255,255,255,.1);flex-wrap:wrap}.grade-btn{display:inline-flex;align-items:center;justify-content:center;padding:1rem 2rem;background:var(--primary);color:var(--white);text-decoration:none;border-radius:var(--radius-full);font-weight:600;transition:all var(--transition-fast);box-shadow:0 4px 12px #2563eb66}.grade-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px #2563eb80;background:var(--primary-light)}.empty-state{text-align:center;padding:var(--spacing-3xl) var(--spacing-2xl);background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:var(--radius-xl);color:var(--gray-300);box-shadow:var(--shadow-lg);border:1px solid rgba(255,255,255,.1)}.empty-state p{font-size:1.25rem;color:var(--gray-300);font-weight:500}@media (max-width: 768px){.view-evaluation-submissions{padding:var(--spacing-2xl) var(--spacing-md)}.page-header,.submission-header{flex-direction:column;gap:var(--spacing-md)}.submission-meta{align-items:flex-start;text-align:left}.submission-actions{flex-direction:column}.grade-btn{width:100%;text-align:center}}.student-statistics{min-height:calc(100vh - 80px);padding:var(--spacing-3xl) var(--spacing-xl);position:relative;background:var(--bg-primary)}.student-statistics .container{max-width:1400px;margin:0 auto}.statistics-header{text-align:center;margin-bottom:var(--spacing-3xl);color:var(--white);animation:fadeInDown .6s ease-out}.statistics-header h1{font-size:clamp(2rem,5vw,3.5rem);margin-bottom:var(--spacing-xl);text-shadow:0 4px 20px rgba(0,0,0,.2);font-weight:700;letter-spacing:-1px;background:linear-gradient(135deg,#fff,#fffc);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-actions{display:flex;gap:var(--spacing-md);justify-content:center;flex-wrap:wrap;align-items:center}.download-pdf-btn{padding:.75rem 1.5rem;background:var(--primary);color:var(--white);border:2px solid var(--primary);border-radius:var(--radius-full);font-weight:600;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden;z-index:1;box-shadow:0 4px 12px #2563eb66}.download-pdf-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#fff3;transform:translate(-50%,-50%);transition:width .6s,height .6s;z-index:-1}.download-pdf-btn:hover:before{width:300px;height:300px}.download-pdf-btn:hover{background:var(--primary-light);border-color:var(--primary-light);transform:translateY(-3px) scale(1.02);box-shadow:0 6px 20px #2563eb99}.back-btn{padding:.75rem 1.5rem;background:#ffffff26;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--white);border:2px solid rgba(255,255,255,.3);border-radius:var(--radius-full);font-weight:600;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden;z-index:1}.back-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#fff3;transform:translate(-50%,-50%);transition:width .6s,height .6s;z-index:-1}.back-btn:hover:before{width:300px;height:300px}.back-btn:hover{background:#ffffff40;border-color:#ffffff80;transform:translateY(-3px) scale(1.02)}.filters-section{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-xl);margin-bottom:var(--spacing-3xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;border:1px solid rgba(255,255,255,.1);animation:fadeInUp .6s ease-out;position:relative;overflow:hidden}.filters-section h2{margin-bottom:var(--spacing-lg);color:var(--white);font-size:1.5rem;font-weight:700;text-shadow:0 2px 10px rgba(0,0,0,.2)}.filters{display:flex;gap:var(--spacing-lg);align-items:flex-end;flex-wrap:wrap}.filter-group{display:flex;flex-direction:column;gap:var(--spacing-sm);flex:1;min-width:200px}.filter-group label{font-weight:600;color:var(--white);font-size:.9rem;text-shadow:0 1px 3px rgba(0,0,0,.2)}.filter-select{padding:.75rem 1rem;border:2px solid rgba(255,255,255,.1);border-radius:var(--radius-md);font-size:1rem;background:var(--bg-secondary);color:var(--white);transition:all var(--transition-fast);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.filter-select:hover{border-color:#fff3;background:var(--bg-tertiary)}.filter-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb4d;background:var(--bg-tertiary)}.filter-select option{background:var(--bg-secondary);color:var(--white)}.clear-filters-btn{padding:.75rem 1.5rem;background:#ef444433;color:var(--white);border:2px solid rgba(239,68,68,.3);border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:relative;overflow:hidden;z-index:1}.clear-filters-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ef44444d;transform:translate(-50%,-50%);transition:width .6s,height .6s;z-index:-1}.clear-filters-btn:hover:before{width:300px;height:300px}.clear-filters-btn:hover{background:#ef44444d;border-color:#ef444480;transform:translateY(-3px) scale(1.02);box-shadow:0 4px 12px #ef444466}.collective-stats-section{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) 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rgba(37,99,235,.3)}.stat-card.highlight .stat-value{color:var(--white);text-shadow:0 2px 8px rgba(0,0,0,.3)}.stat-label{font-size:.9rem;color:var(--gray-300);font-weight:500}.stat-card.highlight .stat-label{color:#ffffffe6}.distribution-section{margin-top:var(--spacing-2xl);padding-top:var(--spacing-2xl);border-top:2px solid rgba(255,255,255,.1)}.distribution-section h3{margin-bottom:var(--spacing-lg);color:var(--white);font-size:1.25rem;font-weight:600;text-shadow:0 2px 10px rgba(0,0,0,.2)}.distribution-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--spacing-md)}.distribution-card{padding:var(--spacing-lg);border-radius:var(--radius-md);text-align:center;border:2px solid;transition:all var(--transition-base);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:relative;overflow:hidden}.distribution-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;transform:scaleX(0);transform-origin:left;transition:transform var(--transition-base)}.distribution-card:hover:before{transform:scaleX(1)}.distribution-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #0000004d}.distribution-card.excellent{background:#22c55e26;border-color:#22c55e66;color:#4ade80}.distribution-card.excellent:before{background:#22c55e}.distribution-card.excellent:hover{background:#22c55e40;box-shadow:0 8px 24px #22c55e66}.distribution-card.good{background:#3b82f626;border-color:#3b82f666;color:#60a5fa}.distribution-card.good:before{background:#3b82f6}.distribution-card.good:hover{background:#3b82f640;box-shadow:0 8px 24px #3b82f666}.distribution-card.average{background:#eab30826;border-color:#eab30866;color:#facc15}.distribution-card.average:before{background:#eab308}.distribution-card.average:hover{background:#eab30840;box-shadow:0 8px 24px #eab30866}.distribution-card.poor{background:#ef444426;border-color:#ef444466;color:#f87171}.distribution-card.poor:before{background:#ef4444}.distribution-card.poor:hover{background:#ef444440;box-shadow:0 8px 24px #ef444466}.distribution-label{font-size:.9rem;font-weight:600;margin-bottom:var(--spacing-sm)}.distribution-value{font-size:2rem;font-weight:700}.individual-stats-section{background:var(--bg-card);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:0 8px 32px #0006,0 2px 8px #0003;border:1px solid rgba(255,255,255,.1);animation:fadeInUp .6s ease-out .4s both;position:relative;overflow:hidden}.individual-stats-section h2{margin-bottom:var(--spacing-xl);color:var(--white);font-size:1.75rem;font-weight:700;text-shadow:0 2px 10px rgba(0,0,0,.2)}.students-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--spacing-lg)}.student-card{background:var(--bg-secondary);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);padding:var(--spacing-lg);transition:all var(--transition-base);position:relative;overflow:hidden}.student-card:before{content:"";position:absolute;top:0;left:0;bottom:0;width:4px;background:var(--primary);transform:scaleY(0);transform-origin:top;transition:transform var(--transition-base)}.student-card:hover:before{transform:scaleY(1)}.student-card:hover{transform:translateY(-4px);box-shadow:0 12px 48px #00000080,0 4px 16px #2563eb4d;background:var(--bg-card-hover);border-color:#2563eb4d}.student-header{margin-bottom:var(--spacing-lg);padding-bottom:var(--spacing-md);border-bottom:2px solid rgba(255,255,255,.1)}.student-header h3{margin:0 0 var(--spacing-xs) 0;color:var(--white);font-size:1.25rem;font-weight:700;text-shadow:0 2px 8px rgba(0,0,0,.2)}.student-email{margin:0;color:var(--gray-300);font-size:.9rem}.student-stats{display:flex;flex-direction:column;gap:var(--spacing-sm);margin-bottom:var(--spacing-lg)}.student-stat-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) 0}.student-stat-item.highlight{background:linear-gradient(135deg,#2563eb26,#1e3a5f26);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);font-weight:600;border:1px solid rgba(37,99,235,.2)}.student-stat-item .stat-label{color:var(--gray-300);font-size:.9rem}.student-stat-item .stat-value{color:var(--primary);font-weight:600;font-size:1rem;text-shadow:0 2px 8px rgba(37,99,235,.3)}.student-stat-item.highlight .stat-value{color:var(--primary-light);font-size:1.1rem}.course-stats{margin-top:var(--spacing-lg);padding-top:var(--spacing-lg);border-top:2px solid rgba(255,255,255,.1)}.course-stats h4{margin:0 0 var(--spacing-md) 0;color:var(--white);font-size:1rem;font-weight:600;text-shadow:0 1px 3px rgba(0,0,0,.2)}.course-stat-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) 0;border-bottom:1px solid rgba(255,255,255,.05);transition:all var(--transition-fast)}.course-stat-item:hover{padding-left:var(--spacing-sm);background:#ffffff08;border-radius:var(--radius-sm)}.course-stat-item:last-child{border-bottom:none}.course-name{font-weight:500;color:var(--white);font-size:.9rem}.course-stat-details{display:flex;gap:var(--spacing-md);align-items:center;font-size:.85rem;color:var(--gray-300)}.course-average{font-weight:600;color:var(--primary-light);text-shadow:0 1px 4px rgba(37,99,235,.3)}.empty-state{text-align:center;padding:var(--spacing-3xl);background:var(--bg-secondary);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--radius-lg);color:var(--gray-300);border:1px solid rgba(255,255,255,.1);box-shadow:0 4px 16px #0003}.empty-state p{font-size:1.1rem;font-weight:500}.error-message{background:#ef444426;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#f87171;padding:var(--spacing-md);border-radius:var(--radius-md);margin-bottom:var(--spacing-lg);border:2px solid rgba(239,68,68,.4);box-shadow:0 4px 16px #ef444433;font-weight:500}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.filters{flex-direction:column}.filter-group{width:100%}.stats-grid{grid-template-columns:repeat(2,1fr)}.students-grid{grid-template-columns:1fr}}.navbar{background:var(--bg-secondary);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);box-shadow:0 4px 30px #0000004d;border-bottom:1px solid rgba(255,255,255,.1);padding:1rem 0;position:sticky;top:0;z-index:1000;transition:all var(--transition-base)}.navbar-container{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);display:flex;justify-content:space-between;align-items:center}.navbar-brand{font-size:1.75rem;font-weight:700;color:var(--white);text-decoration:none;letter-spacing:-.5px;transition:transform var(--transition-fast);display:flex;align-items:center;gap:.5rem}.navbar-brand:hover{transform:scale(1.05)}.navbar-links{display:flex;gap:var(--spacing-xl);align-items:center}.navbar-links a{color:var(--gray-200);text-decoration:none;font-weight:600;font-size:.95rem;transition:all var(--transition-fast);position:relative;padding:.5rem 0}.navbar-links a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--primary);transition:width var(--transition-base)}.navbar-links a:hover{color:var(--primary)}.navbar-links a:hover:after{width:100%}.navbar-user{display:flex;align-items:center;gap:var(--spacing-lg);margin-left:var(--spacing-lg);padding-left:var(--spacing-lg);border-left:1px solid rgba(255,255,255,.1)}.navbar-user span{color:var(--gray-200);font-size:.9rem;font-weight:500;padding:.5rem 1rem;background:var(--bg-tertiary);border-radius:var(--radius-full)}.logout-btn{background:var(--error);color:var(--white);border:none;padding:.625rem 1.25rem;border-radius:var(--radius-full);cursor:pointer;font-weight:600;font-size:.9rem;transition:all var(--transition-fast);box-shadow:var(--shadow-sm)}.logout-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.logout-btn:active{transform:translateY(0)}@media (max-width: 768px){.navbar-container{flex-direction:column;gap:var(--spacing-md);padding:0 var(--spacing-md)}.navbar-links{flex-wrap:wrap;justify-content:center;gap:var(--spacing-md)}.navbar-user{margin-left:0;padding-left:0;border-left:none;border-top:1px solid rgba(255,255,255,.1);padding-top:var(--spacing-md);width:100%;justify-content:center}}:root{--primary-gradient: linear-gradient(135deg, #1e3a5f 0%, #2d4a6b 100%);--primary-gradient-hover: linear-gradient(135deg, #2d4a6b 0%, #3d5a7b 100%);--secondary-gradient: linear-gradient(135deg, #2d4a6b 0%, #1e3a5f 100%);--success-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);--warning-gradient: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);--primary: #2563eb;--primary-dark: #1e40af;--primary-light: #3b82f6;--secondary: #1e3a5f;--accent: #3b82f6;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--bg-card: #1e293b;--bg-card-hover: #334155;--white: #ffffff;--gray-50: #f8fafc;--gray-100: #f1f5f9;--gray-200: #e2e8f0;--gray-300: #cbd5e1;--gray-400: #94a3b8;--gray-500: #64748b;--gray-600: #475569;--gray-700: #334155;--gray-800: #1e293b;--gray-900: #0f172a;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 30px rgba(0, 0, 0, .15);--shadow-xl: 0 20px 60px rgba(0, 0, 0, .2);--shadow-2xl: 0 25px 50px rgba(0, 0, 0, .25);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-2xl: 24px;--radius-full: 9999px;--spacing-xs: .5rem;--spacing-sm: .75rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4rem;--transition-fast: .15s ease;--transition-base: .3s ease;--transition-slow: .5s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg-primary);background-attachment:fixed;min-height:100vh;color:var(--white);line-height:1.6}#root{min-height:100vh}code{font-family:Fira Code,source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}html{scroll-behavior:smooth}::selection{background:var(--primary);color:var(--white)}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--gray-600);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--gray-500)}