/* 自定义样式 */
body {
    background-color: #f8f9fa;
}

.file-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background-color: rgba(13, 110, 253, 0.1);
}

.card {
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15) !important;
}

.navbar-brand {
    font-weight: bold;
}

.btn {
    border-radius: 8px;
}

.form-control:focus,
.form-select:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .file-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }

    .card-body {
        padding: 1rem;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 进度条样式 */
.progress {
    height: 10px;
    border-radius: 5px;
}

.progress-bar {
    border-radius: 5px;
}