*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:#333;background:#f5f5f5}.app{min-height:100vh}.app-header{background:#2c3e50;color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.app-header h1{font-size:1.5rem}.app-header nav a{color:#fff;text-decoration:none;margin-left:1.5rem}.app-header nav a:hover{text-decoration:underline}main{max-width:1200px;margin:2rem auto;padding:0 1rem}.upload-area{border:2px dashed #ccc;border-radius:8px;padding:3rem;text-align:center;background:#fff;cursor:pointer;transition:border-color .3s}.upload-area:hover{border-color:#3498db}.upload-area.drag-over{border-color:#3498db;background:#ebf5fb}.btn{padding:.75rem 1.5rem;border:none;border-radius:4px;cursor:pointer;font-size:1rem}.btn-primary{background:#3498db;color:#fff}.btn-primary:hover{background:#2980b9}.btn:disabled{background:#ccc;cursor:not-allowed}.card{background:#fff;border-radius:8px;padding:1.5rem;margin-bottom:1rem;box-shadow:0 2px 4px #0000001a}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500}.form-group select{width:100%;padding:.5rem;border:1px solid #ddd;border-radius:4px}.file-list{margin-top:1rem}.file-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem;background:#f8f9fa;border-radius:4px;margin-bottom:.5rem}.file-item .filename{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-item .size{color:#666;margin-left:1rem;font-size:.875rem}.progress-bar{width:100%;height:8px;background:#e0e0e0;border-radius:4px;overflow:hidden}.progress-bar .fill{height:100%;background:#3498db;transition:width .3s}.tier-badge{display:inline-block;padding:.25rem .75rem;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:uppercase}.tier-anonymous{background:#e0e0e0;color:#666}.tier-free{background:#2ecc71;color:#fff}.tier-pro{background:#9b59b6;color:#fff}.limitations{background:#fff3cd;border:1px solid #ffc107;border-radius:4px;padding:1rem;margin-top:1rem;font-size:.875rem}