.file-list-container{max-height:120px;overflow-y:auto;margin-top:10px;font-size:16px;padding:5px;color:#fff}.category-file-list{list-style:none;padding-left:0;margin:0}.category-file-list li{padding:4px 0;cursor:pointer}.category-file-list li:hover{text-decoration:underline}.file-list-container::-webkit-scrollbar{width:6px}.file-list-container::-webkit-scrollbar-thumb{background-color:hsla(0,0%,100%,.5);border-radius:3px}.file-list-container::-webkit-scrollbar-track{background-color:hsla(0,0%,100%,.2)}.no-files{margin-top:10px;font-size:12px;color:hsla(0,0%,100%,.8)}:root{--primary:#1a3a7a;--secondary:#2c5aa0;--accent:#ff6b6b;--light:#f0f5ff;--dark:#0a1a35;--success:#4caf50;--warning:#ff9800;--gray:#e0e0e0;--text:#333}*{margin:0;padding:0;box-sizing:border-box;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}body{background-color:var(--light);color:var(--text);background-image:radial-gradient(circle at 10% 20%,rgba(26,58,122,.05) 0,rgba(26,58,122,.05) 20%,transparent 0),radial-gradient(circle at 90% 80%,rgba(44,90,160,.05) 0,rgba(44,90,160,.05) 20%,transparent 0),linear-gradient(90deg,#f0f5ff,#e6f0ff);min-height:100vh;position:relative;overflow-x:hidden}body:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(30deg,transparent 65%,hsla(0,100%,71%,.05) 0),linear-gradient(150deg,transparent 65%,rgba(76,175,80,.05) 0),linear-gradient(270deg,transparent 65%,rgba(255,152,0,.05) 0);pointer-events:none;z-index:-1}.container{max-width:1200px;margin:0 auto;padding:20px}header{background-color:var(--primary);color:#fff;padding:15px 0;box-shadow:0 4px 12px rgba(0,0,0,.1);position:sticky;top:0;z-index:100}.header-content{justify-content:space-between}.header-content,.logo{display:flex;align-items:center}.logo{gap:10px;font-size:1.8rem;font-weight:700}.logo i{color:var(--accent)}nav ul{display:flex;list-style:none;gap:30px}nav a{color:#fff;text-decoration:none;font-weight:500;transition:color .3s;position:relative;padding:5px 0}nav a:hover{color:var(--accent)}nav a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background-color:var(--accent);transition:width .3s}nav a:hover:after{width:100%}.hero{text-align:center;padding:60px 20px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;border-radius:0 0 20px 20px;margin-bottom:40px;position:relative;overflow:hidden}.hero:before{content:"∫ ∑ ∏ √ ∞ ∂ ∇";position:absolute;top:0;left:0;width:100%;height:100%;font-size:120px;opacity:.1;line-height:1.2;pointer-events:none;font-weight:700}.hero h1{font-size:3.5rem;margin-bottom:15px}.hero h1,.hero p{position:relative}.hero p{font-size:1.2rem;max-width:700px;margin:0 auto 30px;opacity:.9}.cta-button{background-color:var(--accent);color:#fff;border:none;padding:12px 30px;font-size:1.1rem;border-radius:50px;cursor:pointer;transition:all .3s;font-weight:700;position:relative;z-index:2;box-shadow:0 4px 15px hsla(0,100%,71%,.4)}.cta-button:hover{background-color:#ff5252;transform:translateY(-3px);box-shadow:0 6px 20px hsla(0,100%,71%,.6)}.upload-section{background:#fff;border-radius:15px;padding:30px;margin-bottom:40px;box-shadow:0 5px 25px rgba(0,0,0,.08)}.section-title{font-size:2rem;color:var(--primary);margin-bottom:25px;display:flex;align-items:center;gap:10px}.section-title i{color:var(--accent)}.upload-area{border:3px dashed var(--gray);border-radius:12px;padding:40px 20px;text-align:center;cursor:pointer;transition:all .3s;background-color:rgba(240,245,255,.5);position:relative}.upload-area:hover{border-color:var(--secondary);background-color:rgba(44,90,160,.05)}.upload-area i{font-size:60px;color:var(--secondary);margin-bottom:15px}.upload-area h3{font-size:1.5rem;color:var(--primary);margin-bottom:10px}.upload-area p{color:#666;margin-bottom:20px}.browse-button{background-color:var(--secondary);color:#fff;border:none;padding:10px 25px;border-radius:8px;cursor:pointer;font-weight:500;transition:background-color .3s;margin:10px 0}.browse-button:hover{background-color:var(--primary)}.category-selector{margin:20px 0;width:100%;text-align:center}.category-selector label{display:block;margin-bottom:10px;font-weight:500;color:var(--primary)}.category-selector select{width:60%;padding:12px 15px;border:2px solid var(--gray);border-radius:10px;background:#fff;font-size:1rem;transition:border-color .3s}.category-selector select:focus{border-color:var(--secondary);outline:none}.categories{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;margin-bottom:40px}.category-card{background:#fff;border-radius:15px;overflow:hidden;box-shadow:0 5px 15px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;position:relative;cursor:pointer}.category-card:hover{transform:translateY(-10px);box-shadow:0 12px 25px rgba(0,0,0,.15)}.category-icon{height:120px;display:flex;align-items:center;justify-content:center;font-size:50px;color:#fff}.category-amc{background:linear-gradient(135deg,#ff9a9e,#fad0c4)}.category-aime{background:linear-gradient(135deg,#a1c4fd,#c2e9fb)}.category-camp{background:linear-gradient(135deg,#84fab0,#8fd3f4)}.category-content{padding:20px}.category-content h3{color:var(--primary);margin-bottom:10px}.category-content p{color:#666;font-size:.95rem;margin-bottom:15px}.file-count{background:var(--light);color:var(--secondary);padding:5px 12px;border-radius:20px;font-size:.9rem;font-weight:500}.search-section{background:#fff;border-radius:15px;padding:30px;margin-bottom:40px;box-shadow:0 5px 25px rgba(0,0,0,.08)}.search-container{display:flex;gap:15px;margin-bottom:25px}.search-input{flex:1;padding:15px 20px;border:2px solid var(--gray);border-radius:10px;font-size:1rem;transition:border-color .3s}.search-input:focus{border-color:var(--secondary);outline:none}.search-button{background:var(--secondary);color:#fff;border:none;padding:0 30px;border-radius:10px;cursor:pointer;font-weight:500;font-size:1rem;transition:background .3s}.search-button:hover{background:var(--primary)}.filters{display:flex;flex-wrap:wrap;gap:15px;margin-bottom:20px}.filter-group{display:flex;flex-direction:column;min-width:200px}.filter-group label{font-weight:500;margin-bottom:8px;color:var(--primary)}.filter-group select{padding:10px 15px;border:2px solid var(--gray);border-radius:8px;background:#fff}.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px}.file-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 4px 12px rgba(0,0,0,.08);transition:transform .3s}.file-card:hover{transform:translateY(-5px)}.file-header{padding:20px;border-bottom:1px solid var(--gray);gap:15px}.file-header,.file-icon{display:flex;align-items:center}.file-icon{width:50px;height:50px;border-radius:10px;justify-content:center;font-size:24px;color:#fff}.file-icon.pdf{background:#e74c3c}.file-icon.docx{background:#3498db}.file-icon.ppt{background:#e67e22}.file-icon.xls{background:#27ae60}.file-icon.img{background:#9b59b6}.file-info h4{color:var(--primary);margin-bottom:5px}.file-info .category-tag{background:var(--light);color:var(--secondary);padding:3px 10px;border-radius:20px;font-size:.8rem;display:inline-block}.file-body{padding:20px}.file-description{color:#666;margin-bottom:15px;font-size:.95rem;line-height:1.6}.file-meta{display:flex;justify-content:space-between;color:#888;font-size:.85rem}.file-actions{display:flex;gap:10px;padding:15px 20px;border-top:1px solid var(--gray)}.action-button{flex:1;padding:8px 0;text-align:center;border-radius:8px;font-weight:500;cursor:pointer;transition:all .3s}.download-btn{background:var(--secondary);color:#fff}.download-btn:hover{background:var(--primary)}.preview-btn{background:var(--light);color:var(--secondary)}.preview-btn:hover{background:var(--gray)}footer{background:var(--dark);color:#fff;padding:40px 0 20px;margin-top:50px}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-bottom:30px}.footer-column h3{font-size:1.3rem;margin-bottom:20px;position:relative;padding-bottom:10px}.footer-column h3:after{content:"";position:absolute;bottom:0;left:0;width:50px;height:2px;background:var(--accent)}.footer-column ul{list-style:none}.footer-column ul li{margin-bottom:12px}.footer-column a{color:#ccc;text-decoration:none;transition:color .3s}.footer-column a:hover{color:#fff}.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid hsla(0,0%,100%,.1);color:#aaa;font-size:.9rem}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);z-index:1000;align-items:center;justify-content:center}.modal-content{background:#fff;border-radius:15px;width:90%;max-width:800px;max-height:90vh;overflow:auto;padding:30px;position:relative;box-shadow:0 10px 50px rgba(0,0,0,.3)}.close-modal{position:absolute;top:20px;right:20px;font-size:1.8rem;cursor:pointer;color:#666;transition:color .3s}.close-modal:hover{color:var(--accent)}.preview-area{min-height:400px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;border:2px dashed var(--gray);border-radius:10px;margin-top:20px}.preview-area img{max-width:100%;max-height:400px;margin-bottom:20px}.preview-area .no-preview{text-align:center;color:#666}.preview-area .no-preview i{font-size:60px;margin-bottom:15px;color:var(--secondary)}@media (max-width:768px){.header-content{flex-direction:column;gap:15px}nav ul{gap:15px}.hero h1{font-size:2.5rem}.search-container{flex-direction:column}.categories,.results-grid{grid-template-columns:1fr}.modal-content{padding:20px}.category-selector select{width:100%}}.notification{position:fixed;top:20px;right:20px;background:#fff;border-radius:8px;padding:15px 25px;box-shadow:0 5px 15px rgba(0,0,0,.2);display:flex;align-items:center;gap:15px;z-index:2000;transform:translateX(200%);transition:transform .5s}.notification.show{transform:translateX(0)}.notification.success{border-left:4px solid var(--success)}.notification.error{border-left:4px solid var(--accent)}.notification i{font-size:24px}.notification.success i{color:var(--success)}.notification.error i{color:var(--accent)}.notification .text{flex:1}.notification .close{cursor:pointer;color:#999;font-size:1.2rem}