.app-container{min-height:100vh;background-color:#f5f7fa;display:flex;flex-direction:column;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:#2d3748}.nav-panel{background-color:#1a202c;padding:1.5rem 3rem;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 6px #0000001a}.nav-title{color:#a3bffa;font-size:2rem;font-weight:600;margin:0;display:flex;align-items:center}.nav-title:after{content:" ∣";color:#a3bffa;margin-left:1rem}.nav-button{padding:.75rem 2rem;background-color:#6b46c1;border:none;border-radius:6px;color:#fff;font-size:1.25rem;cursor:pointer;transition:background-color .3s}.nav-button:hover{background-color:#553c9a}.main-content{flex:1;display:flex;justify-content:center;align-items:center;padding:4rem}.upload-area{background-color:#edf2f7;border:2px dashed #cbd5e0;border-radius:12px;padding:3rem;text-align:center;width:100%;max-width:700px;box-shadow:0 6px 12px #0000001a}.upload-area h2{margin:0 0 1.5rem;color:#2d3748;font-size:2rem;font-weight:700}.upload-area p{margin:.75rem 0;color:#718096;font-size:1.25rem}.upload-area .upload-icon:before{content:"↑↓";font-size:3rem;color:#6b46c1;display:block;margin-bottom:1.5rem}.file-input{display:none}.upload-button{display:inline-block;padding:1rem 2rem;background-color:#6b46c1;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:1.25rem;transition:background-color .3s;margin-top:1.5rem}.upload-button:hover{background-color:#553c9a}.file-info{margin-top:1.5rem;padding:.75rem;background-color:#e2e8f0;border-radius:6px;color:#2d3748;font-size:1rem}.footer{text-align:center;padding:2rem;color:#718096;font-size:1rem}.feedback-container{margin-top:1.5rem;padding:1rem;background-color:#e2e8f0;border-radius:4px;border:1px solid #cbd5e0;color:#2d3748}.feedback-container h3{margin:0 0 .5rem;font-size:1.25rem;font-weight:600}.feedback-container p{margin:.25rem 0;font-size:1rem}.feedback-container strong{color:#6b46c1}