.upload-area{background:linear-gradient(145deg,#fafafa,#f5f5f5);border:2px dashed #e0e0e0;border-radius:12px;transition:all .3s ease}.upload-area:hover{background:linear-gradient(145deg,#f8f9ff,#f0f4ff);border-color:#1976d2;box-shadow:0 8px 24px #1976d226;transform:translateY(-2px)}.upload-hover{background:linear-gradient(145deg,#f8fff8,#f0fff0)!important;border-color:#4caf50!important}.upload-error{background:linear-gradient(145deg,#fff8f8,#fff0f0)!important;border-color:#f44336!important}.upload-button{margin-top:16px}.v-card{border-radius:16px}