.App{min-height:100vh;background:#f5f7fa}.container{max-width:1200px;margin:0 auto;padding:40px 20px}@media (max-width: 768px){.container{padding:20px 15px}}.header{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:40px 20px;text-align:center;box-shadow:0 4px 6px #0000001a}.header-content h1{margin:0 0 10px;font-size:2.5rem;font-weight:700}.header-content p{margin:0;font-size:1.1rem;opacity:.95}@media (max-width: 768px){.header{padding:30px 15px}.header-content h1{font-size:2rem}.header-content p{font-size:1rem}}.upload-section{background:white;border-radius:12px;padding:30px;margin-bottom:40px;box-shadow:0 2px 8px #0000001a}.upload-section h2{margin-top:0;margin-bottom:25px;color:#333;font-size:1.8rem}.upload-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}.form-group label{font-weight:600;margin-bottom:8px;color:#333;font-size:.95rem}.form-group input[type=text],.form-group input[type=email],.form-group select,.form-group textarea{padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:1rem;font-family:inherit;transition:border-color .3s}.form-group input[type=text]:focus,.form-group input[type=email]:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px #667eea1a}.form-group textarea{resize:vertical;min-height:100px}.file-input-wrapper{position:relative;overflow:hidden}.file-input-wrapper input[type=file]{position:absolute;opacity:0;cursor:pointer;width:100%;height:100%}.file-input-wrapper{display:flex;align-items:center;gap:12px;padding:12px;border:2px dashed #667eea;border-radius:8px;background:#f8f9ff;cursor:pointer;transition:all .3s}.file-input-wrapper:hover{border-color:#764ba2;background:#f0f2ff}.file-name{color:#666;font-size:.95rem}.btn-submit{padding:14px 28px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;margin-top:10px}.btn-submit:hover{transform:translateY(-2px);box-shadow:0 8px 16px #667eea4d}.btn-submit:active{transform:translateY(0)}@media (max-width: 768px){.upload-section{padding:20px}.form-row{grid-template-columns:1fr}}.material-card{background:white;border-radius:12px;padding:20px;box-shadow:0 2px 8px #0000001a;transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column}.material-card:hover{transform:translateY(-4px);box-shadow:0 8px 16px #00000026}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:15px}.type-badge{display:inline-block;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:6px 12px;border-radius:20px;font-size:.85rem;font-weight:600}.btn-delete{background:#ff6b6b;color:#fff;border:none;width:28px;height:28px;border-radius:50%;font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .2s}.btn-delete:hover{background:#ff5252;transform:scale(1.1)}.card-title{margin:0 0 10px;color:#333;font-size:1.3rem;font-weight:600}.card-description{color:#666;font-size:.95rem;margin:0 0 15px;line-height:1.5}.card-meta{display:flex;gap:15px;margin-bottom:15px;flex-wrap:wrap}.meta-item{font-size:.85rem;color:#999}.card-file{background:#f5f5f5;padding:10px 12px;border-radius:6px;display:flex;align-items:center;gap:8px;margin-bottom:15px;flex-wrap:wrap}.file-icon{font-size:1.2rem}.file-name{color:#666;font-size:.9rem;word-break:break-word}.btn-download{padding:10px 16px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border:none;border-radius:6px;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s;align-self:flex-start}.btn-download:hover{transform:translateY(-2px);box-shadow:0 4px 12px #667eea4d}@media (max-width: 768px){.material-card{padding:15px}.card-title{font-size:1.1rem}}.materials-section{margin-bottom:40px}.materials-section h2{font-size:1.8rem;color:#333;margin-top:0;margin-bottom:25px}.materials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.empty-state{background:white;border-radius:12px;padding:60px 20px;text-align:center;box-shadow:0 2px 8px #0000001a}.empty-state p{font-size:1.1rem;color:#999;margin:0}@media (max-width: 768px){.materials-grid{grid-template-columns:1fr}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-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:#f5f7fa;color:#333}html,body,#root{height:100%}button,input,textarea,select{font-family:inherit}a{color:inherit;text-decoration:none}