:root{--background-color: #f8f9fa;--primary-text-color: #212529;--secondary-text-color: #6c757d;--accent-color: #4a6cf7;--accent-color-hover: #3b56c4;--border-color: #dee2e6;--border-color-active: var(--accent-color);--success-color: #198754;--error-color: #dc3545;--white: #ffffff;--shadow-color: rgba(0, 0, 0, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--background-color);color:var(--primary-text-color);display:flex;justify-content:center;align-items:center;min-height:100vh;padding:1rem}.app-container{width:100%;max-width:800px;text-align:center}.drop-zone{display:flex;flex-direction:column;justify-content:center;align-items:center;width:100%;height:300px;border:2px dashed var(--border-color);border-radius:12px;background-color:var(--white);cursor:pointer;transition:background-color .2s ease,border-color .2s ease;padding:2rem}.drop-zone.drag-over{border-color:var(--border-color-active);background-color:#f0f3ff}.drop-zone-content{display:flex;flex-direction:column;align-items:center;gap:1rem}.drop-zone .icon{width:60px;height:60px;color:var(--accent-color)}.drop-zone h1{font-size:1.75rem;font-weight:700;color:var(--primary-text-color)}.drop-zone p{color:var(--secondary-text-color);font-size:1rem}.status-container{margin-top:1.5rem;font-size:1.1rem;font-weight:500;min-height:2rem}.status-container.error{color:var(--error-color)}.status-container.loading{color:var(--secondary-text-color)}.output-container{display:flex;flex-direction:column;align-items:center;gap:1.5rem;margin-top:2rem}#cover-preview{width:100%;max-width:350px;height:auto;aspect-ratio:700 / 1000;border-radius:8px;box-shadow:0 4px 15px var(--shadow-color);object-fit:cover;border:1px solid var(--border-color)}.button{display:inline-block;font-size:1rem;font-weight:500;text-decoration:none;color:var(--white);background-color:var(--accent-color);border:none;padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;transition:background-color .2s ease,transform .2s ease;-webkit-user-select:none;user-select:none}.button:hover{background-color:var(--accent-color-hover);transform:translateY(-2px)}.button.secondary{background-color:var(--secondary-text-color);color:var(--white)}.button.secondary:hover{background-color:#5a6268}[hidden]{display:none!important}