/* 图书表单页面样式 */
.book-form-container {
    padding: 20px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.actions {
    display: flex;
    gap: 10px;
}

.book-form {
    margin-bottom: 30px;
}

.card {
    margin-bottom: 20px;
    border: 1px solid rgba(0,0,0,0.125);
    border-radius: 0.25rem;
}

.card-header {
    padding: 0.75rem 1.25rem;
    background-color: rgba(0,0,0,0.03);
    border-bottom: 1px solid rgba(0,0,0,0.125);
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

/* 必填项标记 */
.required {
    color: #dc3545;
    margin-left: 2px;
}

/* 封面预览区域 */
.cover-preview-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.cover-preview {
    width: 100%;
    max-width: 200px;
    height: 280px;
    border: 1px dashed #ccc;
    border-radius: 4px;
    overflow: hidden;
    background-color: #f8f9fa;
    margin-bottom: 10px;
}

.cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.no-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #aaa;
}

.no-cover-placeholder i {
    font-size: 48px;
    margin-bottom: 10px;
}

.upload-container {
    width: 100%;
    max-width: 200px;
}

/* 提交按钮容器 */
.form-submit-container {
    margin-top: 30px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .actions {
        width: 100%;
    }
}