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button{background:none;border:none;color:#2e7d32;font-weight:700;cursor:pointer;text-decoration:none;transition:color .3s ease}.auth-link button:hover{color:#1b5e20;text-decoration:underline}.info-box{background:linear-gradient(135deg,#fff9e6,#fff3cd);border-left:4px solid #ffd700;padding:20px;border-radius:12px;margin-top:28px;box-shadow:0 2px 8px #ffd70033}.info-box p{font-size:14px;color:#5d4e00;font-weight:500;line-height:1.6}.info-box-login{margin-top:20px;background:linear-gradient(135deg,#e3f2fd,#bbdefb);border-left:4px solid #2196f3}.info-box-login p{color:#0d47a1}.auth-logo img{width:60px;height:60px;object-fit:contain}.about-hero{background:linear-gradient(135deg,#1b5e20,#2e7d32,#388e3c);color:#fff;padding:40px 32px;border-radius:20px;margin-bottom:24px;position:relative;overflow:hidden;text-align:center}.about-hero:before{content:"";position:absolute;top:-50%;left:-20%;width:400px;height:400px;background:radial-gradient(circle,rgba(255,215,0,.15) 0%,transparent 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#1e293b;--primary-light: #3b82f6;--secondary-color: #0f766e;--accent-color: #dc2626;--success-color: #16a34a;--warning-color: #d97706;--danger-color: #dc2626;--info-color: #0891b2;--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;--dark-color: #0f172a;--university-blue: #1e3a8a;--university-gold: #fbbf24;--university-green: #059669;--shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, .05);--shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .1), 0 2px 4px -1px rgba(15, 23, 42, .06);--shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, .1), 0 4px 6px -2px rgba(15, 23, 42, .05);--shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, .1), 0 10px 10px -5px rgba(15, 23, 42, .04);--university-gradient: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #1d4ed8 100%);--card-gradient: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);--accent-gradient: 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2rem;display:flex;justify-content:space-between;align-items:center;min-height:72px}.logo{display:flex;align-items:center;gap:.875rem;font-size:1.375rem;font-weight:700;color:var(--university-blue);text-decoration:none;transition:all .2s ease;letter-spacing:-.025em}.logo:hover{color:var(--primary-light);transform:translateY(-1px)}.logo-icon{width:40px;height:40px;background:var(--university-gradient);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--white);font-size:1.375rem;box-shadow:var(--shadow-md);flex-shrink:0}.user-menu{display:flex;align-items:center;gap:1rem}.user-avatar{width:40px;height:40px;border-radius:50%;background:var(--university-gradient);display:flex;align-items:center;justify-content:center;font-weight:600;color:var(--white);cursor:pointer;transition:all .2s ease;font-size:.875rem;border:2px solid var(--gray-200);box-shadow:var(--shadow-sm);flex-shrink:0;overflow:hidden}.user-avatar .avatar-img{width:100%;height:100%;object-fit:cover;border-radius:50%}.user-avatar:hover{transform:scale(1.05);border-color:var(--university-blue);box-shadow:var(--shadow-md)}.btn-icon{width:40px;height:40px;border-radius:10px;border:1px solid var(--gray-200);background:var(--white);color:var(--gray-600);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;font-size:.875rem;box-shadow:var(--shadow-sm);flex-shrink:0}.btn-icon:hover{background:var(--university-blue);color:var(--white);border-color:var(--university-blue);transform:translateY(-2px);box-shadow:var(--shadow-md)}.navigation{background:var(--white);border-bottom:1px solid var(--gray-200);position:sticky;top:60px;z-index:90}.nav-container{max-width:1200px;margin:0 auto;padding:0 2rem;display:flex;justify-content:center}.nav-list{display:flex;list-style:none;gap:.25rem;overflow-x:auto;scrollbar-width:none;padding:.5rem 0}.nav-list::-webkit-scrollbar{display:none}.nav-item{position:relative;white-space:nowrap}.nav-link{display:flex;align-items:center;justify-content:center;gap:.625rem;padding:.75rem 1.25rem;color:var(--gray-600);text-decoration:none;font-weight:500;font-size:.875rem;transition:all .2s ease;border-radius:8px;position:relative;min-height:44px;white-space:nowrap}.nav-link:hover{color:var(--university-blue);background:var(--gray-50);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.nav-link.active{color:var(--white);background:var(--university-gradient);box-shadow:var(--shadow-md)}.nav-link.active:after{content:"";position:absolute;bottom:-1px;left:50%;transform:translate(-50%);width:24px;height:3px;background:var(--university-gold);border-radius:2px}.main-content{flex:1;max-width:1200px;margin:0 auto;padding:2rem;width:100%;display:flex;flex-direction:column;align-items:stretch}.dashboard-page{display:flex;flex-direction:column;gap:2.5rem;width:100%}.welcome-banner{background:var(--card-gradient);border:1px solid var(--gray-200);border-radius:16px;padding:3.5rem 2rem;box-shadow:var(--shadow-md);text-align:center;position:relative;overflow:hidden;margin-bottom:1rem}.welcome-banner:before{content:"";position:absolute;top:-50%;right:-50%;width:400px;height:400px;background:var(--university-gradient);border-radius:50%;opacity:.04}.welcome-banner:after{content:"";position:absolute;bottom:-30%;left:-30%;width:250px;height:250px;background:var(--university-gold);border-radius:50%;opacity:.025}.welcome-content{position:relative;z-index:1}.welcome-banner h1{font-size:2.5rem;font-weight:700;color:var(--gray-900);margin-bottom:1rem;background:var(--university-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.025em}.welcome-banner p{font-size:1.125rem;color:var(--gray-600);max-width:600px;margin:0 auto;line-height:1.6}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.75rem;margin-bottom:1rem}.stat-card{background:var(--white);border:1px solid var(--gray-200);border-radius:16px;padding:2.5rem 2rem;box-shadow:var(--shadow-sm);transition:all .3s ease;position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;text-align:center}.stat-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--university-gradient)}.stat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--university-blue)}.stat-icon{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.75rem;margin-bottom:1.75rem;position:relative}.stat-icon.notes{background:var(--university-gradient);color:var(--white);box-shadow:var(--shadow-md)}.stat-icon.uploads{background:linear-gradient(135deg,var(--success-color) 0%,#059669 100%);color:var(--white);box-shadow:var(--shadow-md)}.stat-icon.downloads{background:linear-gradient(135deg,var(--warning-color) 0%,#d97706 100%);color:var(--white);box-shadow:var(--shadow-md)}.stat-value{font-size:2.5rem;font-weight:700;color:var(--gray-900);margin-bottom:.75rem;line-height:1;text-align:center}.stat-label{color:var(--gray-600);font-weight:600;font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;text-align:center}.recent-notes{background:var(--white);border:1px solid var(--gray-200);border-radius:12px;padding:2rem;box-shadow:var(--shadow-sm)}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.75rem;padding-bottom:1rem;border-bottom:1px solid var(--gray-100)}.section-title{font-size:1.125rem;font-weight:600;color:var(--gray-900);display:flex;align-items:center;gap:.75rem}.section-title:before{content:"";width:4px;height:24px;background:var(--university-gradient);border-radius:2px}.btn-view-all{color:var(--university-blue);text-decoration:none;font-weight:500;font-size:.875rem;display:flex;align-items:center;gap:.5rem;transition:all .2s ease;padding:.625rem 1.25rem;border-radius:8px;border:1px solid var(--gray-200)}.btn-view-all:hover{color:var(--white);background:var(--university-gradient);border-color:var(--university-blue);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.recent-notes-list{display:flex;flex-direction:column;gap:1rem}.recent-note-item{display:flex;align-items:center;gap:1.25rem;padding:1.5rem;background:var(--gray-50);border:1px solid var(--gray-100);border-radius:12px;transition:all .2s ease;cursor:pointer}.recent-note-item:hover{background:var(--white);border-color:var(--university-blue);transform:translate(6px);box-shadow:var(--shadow-md)}.note-thumbnail{width:64px;height:64px;border-radius:12px;background:var(--university-gradient);display:flex;align-items:center;justify-content:center;color:var(--white);font-size:1.375rem;font-weight:600;box-shadow:var(--shadow-md);flex-shrink:0}.note-info{flex:1;display:flex;flex-direction:column;gap:.25rem}.note-title{font-weight:600;color:var(--gray-900);margin-bottom:.25rem;font-size:.875rem;line-height:1.4}.note-meta{font-size:.75rem;color:var(--gray-500);display:flex;align-items:center;gap:.75rem}.browse-page{display:flex;flex-direction:column;gap:2.5rem;width:100%}.browse-header{text-align:center;padding:2.5rem 0}.browse-header h1{font-size:2.5rem;font-weight:700;color:var(--gray-900);margin-bottom:1rem;background:var(--university-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.025em}.browse-header p{font-size:1.125rem;color:var(--gray-600);max-width:600px;margin:0 auto;line-height:1.6}.search-section{background:var(--white);border:1px solid var(--gray-200);border-radius:16px;padding:2.5rem;box-shadow:var(--shadow-md)}.search-container{display:flex;gap:1.25rem;margin-bottom:2rem;flex-wrap:wrap;align-items:stretch}.search-input-wrapper{flex:1;min-width:320px;position:relative}.search-input{width:100%;padding:1.125rem 1.125rem 1.125rem 3.5rem;border:2px solid var(--gray-200);border-radius:12px;font-size:.875rem;transition:all .2s ease;background:var(--gray-50);height:48px}.search-input:focus{outline:none;border-color:var(--university-blue);box-shadow:0 0 0 4px #1e3a8a1a;background:var(--white)}.search-icon{position:absolute;left:1.125rem;top:50%;transform:translateY(-50%);color:var(--gray-400);z-index:1;font-size:1rem}.filter-group{display:flex;gap:1rem;align-items:stretch;flex-wrap:wrap}.filter-select{padding:1.125rem;border:2px solid var(--gray-200);border-radius:12px;background:var(--white);font-size:.875rem;cursor:pointer;transition:all .2s ease;min-width:180px;height:48px}.filter-select:focus{outline:none;border-color:var(--university-blue);box-shadow:0 0 0 4px #1e3a8a1a}.btn-search{background:var(--university-gradient);color:var(--white);border:none;padding:1.125rem 2rem;border-radius:12px;font-weight:600;font-size:.875rem;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;gap:.625rem;box-shadow:var(--shadow-md);height:48px;white-space:nowrap}.btn-search:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:2rem;margin-top:1rem}.note-card{background:var(--white);border:1px solid var(--gray-200);border-radius:16px;overflow:hidden;box-shadow:var(--shadow-sm);transition:all .3s ease;cursor:pointer;position:relative;display:flex;flex-direction:column;height:100%}.note-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--university-gradient);opacity:0;transition:opacity .3s ease}.note-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--university-blue)}.note-card:hover:before{opacity:1}.note-card-image{width:100%;height:200px;background:var(--card-gradient);display:flex;align-items:center;justify-content:center;color:var(--university-blue);font-size:3.5rem;border-bottom:1px solid var(--gray-100);position:relative;overflow:hidden;flex-shrink:0}.note-card-image:before{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:80px;height:80px;background:var(--university-gradient);border-radius:50%;opacity:.04}.note-card-content{padding:1.75rem;flex:1;display:flex;flex-direction:column}.note-card-title{font-size:1.125rem;font-weight:600;color:var(--gray-900);margin-bottom:.75rem;line-height:1.3;display:-webkit-box;display:-moz-box;display:box;-webkit-line-clamp:2;-moz-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;-moz-box-orient:vertical;box-orient:vertical;overflow:hidden;flex-shrink:0}.note-card-description{color:var(--gray-600);font-size:.875rem;line-height:1.5;margin-bottom:1.25rem;display:-webkit-box;display:-moz-box;display:box;-webkit-line-clamp:3;-moz-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;-moz-box-orient:vertical;box-orient:vertical;overflow:hidden;flex:1}.note-card-meta{display:flex;justify-content:space-between;align-items:center;font-size:.75rem;color:var(--gray-500);padding-top:1rem;border-top:1px solid var(--gray-100);margin-top:auto}.note-card-subject{background:var(--university-gradient);color:var(--white);padding:.375rem 1rem;border-radius:20px;font-weight:600;font-size:.75rem;box-shadow:var(--shadow-sm);letter-spacing:.025em}.upload-page{background:var(--white);border:1px solid var(--gray-200);border-radius:16px;padding:3rem;box-shadow:var(--shadow-md);max-width:800px;margin:0 auto}.upload-header{text-align:center;margin-bottom:3rem}.upload-header h1{font-size:2rem;font-weight:700;color:var(--gray-900);margin-bottom:1rem;background:var(--university-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.025em}.upload-header p{color:var(--gray-600);font-size:1rem;max-width:500px;margin:0 auto;line-height:1.6}.form-group{margin-bottom:2rem}.form-label{display:block;margin-bottom:.875rem;font-weight:600;color:var(--gray-900);font-size:.875rem;letter-spacing:.025em}.form-input,.form-textarea,.form-select{width:100%;padding:1.125rem;border:2px solid var(--gray-200);border-radius:12px;font-size:.875rem;transition:all .2s ease;background:var(--gray-50);height:48px}.form-input:focus,.form-textarea:focus,.form-select:focus{outline:none;border-color:var(--university-blue);box-shadow:0 0 0 4px #1e3a8a1a;background:var(--white)}.form-textarea{resize:vertical;min-height:140px;line-height:1.5;padding:1.125rem;height:auto}.file-upload{border:2px dashed var(--gray-300);border-radius:16px;padding:3.5rem 2rem;text-align:center;background:var(--gray-50);transition:all .3s ease;cursor:pointer;position:relative;overflow:hidden;margin-bottom:2rem}.file-upload:before{content:"";position:absolute;top:-50%;left:-50%;width:250px;height:250px;background:var(--university-gradient);border-radius:50%;opacity:.03}.file-upload:hover{border-color:var(--university-blue);background:var(--white);transform:translateY(-4px);box-shadow:var(--shadow-lg)}.file-upload-icon{font-size:3.5rem;color:var(--university-blue);margin-bottom:1.25rem;position:relative;z-index:1}.file-upload-text{color:var(--gray-700);font-weight:600;margin-bottom:.75rem;font-size:1.125rem}.file-upload-hint{color:var(--gray-500);font-size:.875rem;line-height:1.4}.btn-primary{background:var(--university-gradient);color:var(--white);border:none;padding:1.125rem 2.5rem;border-radius:12px;font-weight:600;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:.75rem;font-size:.875rem;box-shadow:var(--shadow-md);height:48px;white-space:nowrap}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{background:var(--gray-100);color:var(--gray-700);border:1px solid var(--gray-200);padding:1.125rem 2.5rem;border-radius:12px;font-weight:600;cursor:pointer;transition:all .2s ease;font-size:.875rem;height:48px}.btn-secondary:hover{background:var(--gray-200);border-color:var(--gray-300);transform:translateY(-1px)}@media(max-width:1024px){.header-content{padding:1rem 1.5rem}.nav-container{padding:0 1.5rem}.main-content{padding:1.5rem}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.notes-grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:1.5rem}.search-container{flex-direction:column;gap:1rem}.search-input-wrapper{min-width:100%}.filter-group{width:100%;justify-content:stretch}.filter-select{flex:1;min-width:auto}.btn-search{width:100%;justify-content:center}.stats-grid{grid-template-columns:1fr}.welcome-banner h1,.browse-header h1{font-size:2rem}}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.flex-center{display:flex;align-items:center;justify-content:center}.flex-between{display:flex;align-items:center;justify-content:space-between}.flex-start{display:flex;align-items:center;justify-content:flex-start}.w-full{width:100%}.h-full{height:100%}.gap-1{gap:.25rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:.75rem}.mt-4{margin-top:1rem}.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:.75rem}.mb-4{margin-bottom:1rem}.loading-state,.empty-state{text-align:center;padding:3rem;color:var(--gray-500)}.empty-state-icon{font-size:4rem;margin-bottom:1rem;opacity:.5}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .5s ease-out}.notification{position:fixed;top:20px;right:20px;background:#fff;padding:1rem 1.5rem;border-radius:12px;box-shadow:var(--shadow-lg);z-index:1000;transform:translate(400px);transition:transform .3s ease;max-width:400px}.notification-success{border-left:4px solid var(--success-color)}.notification-error{border-left:4px solid var(--danger-color)}.notification-info{border-left:4px solid var(--primary-color)}.empty-state-icon{font-size:3rem;margin-bottom:1rem}.coming-soon{text-align:center;padding:3rem 2rem;background:#f8f9fa;border-radius:8px;margin:2rem 0}.notification{position:fixed;top:20px;right:20px;background:#fff;padding:16px 24px;border-radius:8px;box-shadow:0 4px 12px #00000026;transform:translate(400px);transition:transform .3s ease;z-index:10000;max-width:400px}.notification.show{transform:translate(0)}.notification-content{display:flex;align-items:center;gap:12px}.notification-icon{font-size:20px}.notification-message{color:#333;font-size:14px}.notification-success{border-left:4px solid #10b981}.notification-error{border-left:4px solid #ef4444}.notification-info{border-left:4px solid #3b82f6}.logo-icon{font-size:2rem;margin-right:.5rem}.logo{display:flex;align-items:center;gap:.5rem}